I’m sorry you’re locked out. Your Apple relay address can help identify the sign-in you used, but I can’t look up or unlock a personal account from this public forum.
Here are some suggestions you can try:
On your iPhone, open Settings > your name > Sign in with Apple, then select Copilot or Microsoft. If you chose Hide My Email, Apple shows the @privaterelay.appleid.com address shared with that app. Keep the full address private rather than posting it here.
Try Copilot again using Continue with Apple and the same Apple ID, rather than entering your primary email as a different sign-in. If the account is locked, follow the instructions shown on the lock screen. If it offers a reinstatement link beginning with aka.ms/, use that link. If you cannot tell which recovery route applies, use the Microsoft sign-in guidance.
Once you regain access, you can check whether your primary email can be added as an alias to the existing Microsoft account. That change requires you to sign in; support cannot change account details for you through a forum request.
I can’t confirm the account’s data from here or guarantee recovery. According to the current Copilot guidance, existing chats and Projects move with the same personal sign-in, and Projects now appear as Notebooks. Check there after access is restored.