Yes, because when Quds officers arrive into countries they promptly announce themselves as Quds officers
How did that Indian intelligence officer get into Iran?
Quds gets in the same way Mossad/CIA/MI6 get into countries and in the Middle East.
As for Sistani he likes neither the Iranian or US presence in his country. He may use his influence to suggest a better path for his country. But the man is not playing the great game like Khamenai. He is a cleric who believes the religious establishment shouldn’t interfere with the government too much or seen as questioning the legitimacy of elected officials.
Given how his simple decree during ISIS invasion gave rise to tens of thousands of Iraqi volunteers. The man is so respected in Iraq he could have seized power much like Khomeini did if he wanted. But he hasn’t.
If you want to say Khamenai is the face of Axis of Resistance than that is believable. But the face of Shiite Islam from a theology standpoint? No. Because many Shiites and Shiite derivative religions (Alawites, Houthis) do not accept the notion of “Velayat-e faqih” much less that Khamenai is the leader.