Thank you too for the update and I hope at least some of our feedback proves useful.
The current prompt says “Verification required”. It may be helpful to implicate the RP, by instead saying “Verification required by ebay.com” (or “Verification preferred by ebay.com”, as appropriate).
Also, in addition to the existing cancel button, perhaps add a “continue without verification” button, whereby Bitwarden sends a successful response, but with the UV flag cleared. This gives the user a sense of control, while at the same time enabling the RP to subsequently enforce its requirement if it so choses.
It seems to me that adding “continue without verification” might moot the forthcoming rollback.