Is the air force developing a different aircraft than the navy? Looks like they have separate budgets so I assume yes.
Yes, they are. Lessons were learned (again) about shared aircraft. F-111 ought to have been enough, but perhaps not.
The USAF has requested $1.5B for 2022 for its F-X/NGAD. It's tracking with the B-21 (mostly) and I'd guess next year or the year after, we'll have some sort of selection done.