Once TSMC starts spinning up more of its 5nm fabs and producers start moving to those nodes for mobile things will be less tight for 7nm. There is a reason why AMD is expecting its supply situation to improve over the next two quarters.
Right now AMD is producing current-gen and last-gen stuff on 7nm, and that is making things difficult. For next-gen AMD will be using new nodes for new hardware and old nodes to continue supplying old hardware. That will make things a lot easier.
TSMC also made a lot of investments to up 5nm production a few years back, which will start bearing fruit in 2022. That said, those investments did not anticipate COVID and its impact on the market.
I think things will get better next year, but TBH a lot of things need to get sorted before pricing can return to normal. Between shipping, component costs and even cardboard costs, everything is more difficult than it was.