Are you suggesting they are very frequent? If so, please present the correct tally.
Picking a single case in what is an ongoing escalation consecutive to the Iran-Saudi agreement which I'm sure you noticed, seeing how it's simultaneously playing out in at least two theaters namely Syria (drone strikes on USA occupation forces, now the recent zionist attack) and the south Caucasus, is not going to disprove the point.
What I can reiterate with certainty (and again, you're welcome to prove me wrong) is that out of several hundreds of air strikes claimed by the zionists, a ridiculously low percentage is confirmed to have resulted in the martyrdom of IRGC or Qods Force personnel.
Another fact is that the zionist regime, zionist media as well as their allies have been trying their best to twist this reality with faulty, manipulative semantics and declarations.
Here's a concrete and typical example. In late November 2019, Tel Aviv purported to have carried out a series of raids targeting Syrian missile sites, warehouses, air defence batteries as well as "16 targets" supposedly pertaining to Iran's Qods Force and to pro-Iranian groups stationed in Syria. Of course zionists declared that Syria failed to intercept any of the AGM fired, a claim disputed by Damascus. And what are the respective casualty reports? Let's find out.
With enhanced Iranian capabilities, more adventurous Israeli tactics and the US in retreat, strikes in Syria this week reflect a confrontation at a boil
In other terms, according to Syrian authorities the Resistance Axis lost no combatants, however two Syrian civilians were martyred. According to the zionist regime, those two civilians were IRGC units. Whilst the SOHR ("Syrian Observatory for Human Rights"), a one-man operation run by a taylor of Syrian descent residing in London who hasn't set foot in his country of origin for ages - in fact a mouthpiece for MI6 / NATO disinformation and psy-ops all along, was quoted as saying "16 Iranians" in addition to five Syrian soldiers and two Syrian civilians were martyred.
Just launched a search covering the period between November 1, 2019 and January 1, 2020, restricting the results to Iranian-hosted websites (*.ir). Turns out there's no report whatsoever about Iranians embracing martyrdom in the Levant during said period.
This is while the Islamic Republic isn't exactly known for shying away from publicizing the names of fallen Iranian military personnel, nor from sponsoring public funeral processions for the latter. Simultaneously, the SOHR's credibility tends to be abysmal and the zionist regime well known to be practicing full fledged censorship in military matters in addition to issuing bogus claims about Iran.
Now if someone prefers to go with zionist or Syrian insurgent narratives, that will be their issue but it's certainly not as if these narratives had been substantiated by evidence, not to mention the fundamental bias of their authors against anything Iranian, as well as their ample record of spreading fake news on Iran.
A further instance of zionist media attempting to mislead the public is reflected by the fallacious semantic slips they operate in their reporting on zionist attacks against Syria. In particular, they frequently peddle the phrase "Iranian militias" in their headlines. Can anyone tell me what in the world these so-called "Iranian militias" are supposed to be?
Firstly, there are no "militias" in the Axis of Resistance - this is a derogatory designation since it historically applied to far-right (fascist) outfits in Europe before and during World War 2. What we have in the Resistance front are either multipronged organizations active in various fields of politics, economy, society, culture and security such as Basije Mostaz'afan in Iran or HezbOllah in Lebanon, which in addition to the above may have a military branch of their own; or proper military corps of revolutionary nature, such as Iran's Sepah (IRGC), Iraq's Hashd ul-Sha'bi.
Secondly, whenever zionist and affiliated media throw around this term, they are actually referencing Resistance groups allied with Iran. Groups which, as a matter of fact, are not comprising Iranian nationals. Anti-Iranian propaganda rags will nonetheless talk of so-called "Iranian militia" in order to generate the impression that IRGC members were martyred when no such thing happened.
Two examples, one from January this year in the Times of Isra"el" and another from April 2022 by the UK-based Asharq Al-Awsat which is owned by Saudis:
This neuro-linguistic programming is not merely aimed at targeting Iran by means of psychological warfare, but also at promoting the notion that Tel Aviv is "the only" regime "to kill Iranians", in the very words uttered in July 2019 by the zionist "Regional Cooperation Minister" (sic) of all officials, one Tzachi Hanegbi.
Which in turn was pretty obviously directed at western-aligned Arab regimes of the region, as well as more generally at any and all audience driven by visceral hostility towards Iran and/or (Shia) Muslims (from takfiri pseudo-"jihadis" and their sympathizers to national-zionists of the west, the American Christian Right and other followers of so-called rapture eschatology and so on). All in the framework of the formalized anti-Iranian regional bloc which was taking shape during Trump's presidency.
To that effect the enemy spared no effort at disinformation, as we just saw.
Lastly, when it comes to retaliation it was carried out in the open after token occurrences of high-profile attacks on Iranian or allied forces in Syria, such as the bombing of the T4 base in Homs where Iranians were martyred, which was promptly met by multiple rocket fire onto Occupied Palestine. Or the martyrdom of Jihad Mughniyah on 18 January 2015, to which HezbOllah responded no more than ten days later by hitting a zionist infantry patrol in the Sheeba Farms with anti-tank missiles, killing two zionist troops.
In lower profile cases, more discrete retaliation might be opted for. If someone's killed under mysterious circumstances in Occupied Palestine over the coming days and weeks and news of it makes it to the press, it might very well hint to Iranian involvement. In this regard, don't count on the zionists nor on the mainstream media they control, to admit to anything though. Then again it wouldn't be their first act of misinformation.
Perhaps we ought to believe Netanyahu's propagandists instead, including their stories of "Iranians killed" in about every zionist air strike on Syria? Is this to say they're more credible than sardar Hajizadeh?