Hello,
May I please know if you have a Work or School account linked to your device? Due to the organization's policies, you may be asked to reset your password frequently. In this case, you will have to reach out to your IT Administrator to check your account.
Another reason, if Microsoft notices any unusual activity, you may be asked to reset your password frequently. So, check your Microsoft account's recent activity page to see if there is any unusual activity in your account.
https://account.live.com/Activity
Do you have the Windows Hello PIN feature enabled on your device? If yes, you can switch the sign-in option from Password to PIN and sign in that way.
To set up the PIN sign-in option, go to Start > Settings > Accounts > Sign-in Options > Windows Hello PIN.
Regarding the password change and having trouble verifying your identity,
Sign in to the Security settings page of your Microsoft Account here:
https://account.live.com/proofs/Manage
- Enable two-factor authentication.
- Click "Change password" on the screen, and uncheck the "Make me change my password every 72 days" checkbox.
- Then, set up the Microsoft Authenticator app to verify your identity.
You can then use your Microsoft Authenticator app to verify your identity on your phone instead of using the @gmail.com recovery address.
After making these changes, see if you can sign in to your computer without any password reset issues.