You can create a sub 1099-R which should have box 7 filled in with 8. You are in good position to do this bc - 1. Roth is after tax, 2. there is loss and no gain to pay taxes on, and 3. it is for current filing year 2022. You probably did not get the form from the brokerage bc they will send it next year for 2023 and it will have a P in box 7. That form could simply be ignored.
There is a real good interactive tool for this, see the link below. I wish I knew of this tool bc I have a worst problem where the access was in inactive 401K and that brokerage is not willing to create the transaction. Anyway, try this link. It is for Roth as well.
https://www.irs.gov/help/ita/how-do-i-correct-an-excess-salary-deferral-to-my-401k
