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/
You don't now the contract what kind agreement ther is signed first of all. So left that alone, second if you asked to me i would eliminate RR and go full with TEI. Every day we didn't started the project is a lost or every day we started the project is victory. Cruisemissile engines should KALE...