why can I not open my apple lock device

See if anything here helps.

User Password Reset.   -

User Password Reset (2).  -  

User Password Reset – Apple ID.  -

Reset user password - M1 chip computer

If you can't reset your Mac login password   *

"I cannot open my apple lock device"

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Are you locked out of your login screen?

Try Resetting your Mac Login Password:

Reset it using the login screen. You'd go through your Apple ID to perform this. Find out more here: If you Forgot your Mac Login Password - Apple Support. Make sure that caps lock is not enabled when typing it.  Does that fix this?