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Need more details please, does a padlock appear on the screen needing a password?
 
Yes there is a padlock and a text field for the password. I called Apple Support and they were of No use.

https://support.apple.com/en-us/102384

Screenshot 2024-03-30 at 19.41.37.png


or https://mrmacintosh.com/how-to-remove-mac-firmware-password-new-way-if-you-have-a-2018-2020-t2-mac/

(specifically, number 7 on that page).
 
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