You made a end user agreement for only using it with F16 probably only with American weapons. But when it comes to design a fighter other level difficulties arise. Like the radar a sensetive technology what they don't want to share with you. Americans allows you when you buy ther weapoins:).
Thats a tactival DATA-LINK, the reason why LM didn't provide you with LINK-16 is because of Indonesian particpation. Link-16 is only for NATO members avaible, it is like France selling frigatte for Egyptian navy with out LINK systems, they have the monkey version.
Indeed, maybe wheb TUSAS come with stronger and lighter engine, or Aselsan with lighter flir then Wescam. Ther are things that can bet better on the TB2.
They will go further with upgrading the old engine.
https://www.defenseone.com/policy/2023/03/air-force-abandons-new-f-35-engine-favor-upgrades/383890/