THE FACT THAT UMMAH CONCEPT IS DONE FOR IS UNDENIABLE. No matter how much i and grieve over it, it's a past. Input of expertise in AZM from Malaysia or indonesia is unlikely or very small (indonesian IF-X). Malaysia is in no one's basket at the moment in regards to 5th Gen. Secondly, Indonesia has already invested money & manpower in KF-X/IF-X. They have less to none experience while we have MRF experience, AMF experience in the form of Thunder manufacturing , Flying experience over almost all important aircrafts in the world.
Turkey on the other hand has the experince on F-16 Assembly, Avionics research but it's not enough. Our APF is if not on same but close level to them due to getting ToT throughout the last decades of different avionics. China is the one that can give us the top level expertise for AZM.
We can try to boost our project by making it a JSF like project but that will involve investments from other countries as well as their shared interests and their own HURDLES. For example, Let's say we source our engine from a country that doesn't want their engine to get to one specific AZM partner, it will be a SITUATION. If we get investment from Middle East / Malaysia for AZM, it will be a pressure on PAC right then, more manpower, facility development, fast-paced R&D, will divert their attention from local goals such as Thunder Program. It would be wise for PAF to go Gripen E/F / Tejas MK2 route for thunder, converting it to a Medium weight platform.
Turkey (May Allah help and protect it) but i am not seeing a good future for them in the next decade. They are the closest geographically to NATO, non-nuclear nation, can be bullied easily by NATO when Turkey get on their nerves. NATO has nuclear nations and nations that have good converntional power as well. Hence one of the reason why PAF didn't opt for TFX Most probably.
Egypt is a good choice, they could invest, but given their close proximity with Israel, i personally would try to avoid that route as our AZM could crash in their territory, giving them a chance to read the jet to inches (this reason doesn't matter tho these times as aeronautics worldwide has advanced to such a standard that this situation rarely matters).