IIRC the PN had moved the SWAT program in-house in 2016-2017. So, if there are any talks in that regard with suppliers, it'll be in that context. I take 'going in-house' might in part have been to classify the specs. Moreover, Turkey's STM did submit a proposal to the PN, but it's being shy about going any further. I take it the SWAT project may be a bespoke design managed by NRDI now (with select foreign suppliers involved).
Likewise, there was a new FAC requirement in 2016 for 4-6 boats, and that too fell off the radar publicly. Last the PN mentioned anything, it said it was talking to Turkey and China (and the Turks said they offered the FAC-55).
IMHO no excuse to not use VTOL UAVs for localized ISR/ISTAR, especially when there are small enough AESA radars in the market. In this sense, the Yarmouk-class may be a test-bed for experimenting with such UAV designs.
Finally, the network-centric aspect is 100% true. The PN invested in a bespoke solution and had Turkey's MilSOFT help out -- i.e., NIXS (see
here and
here for more).
The Jinnah Class Frigates will also be equipped with the Naval Information Exchange System (NIXS) developed by MilSoft for the Pakistan Navy and the indigenous data-link system “Link Green.” The Pakistan Navy has established a nationwide communication infrastructure called RedLine to enable communication between NIXS-equipped platforms.