Doubt it. The final decision hasn't been made yet but it appears the NGAD will be going ahead as planned despite the enormous cost. Like the F-22 Raptor, this will probably be an entirely US program with no exports allowed. The design is still in the early technology demonstrator stage, so all of the major components were going to be redesigned anyway.

https://www.defenseone.com/technology/2025/03/no-more-viable...