Monterey update

Boot to Recovery and repair/First Aid the startup disk and then boot normally and see if problem persists.

If still problem boot to Recovery and reinstall macOS on top of itself

How to reinstall macOS - Apple Support

Last, boot to Recovery ad erase the startup disk and reinstall macOS and restore your data

Try booting to Safe Mode. That boot up takes minutes and clears caches and other things that may resolve your problem.

How to use safe mode on your Mac - Apple Support

A lot of times just boot to Safe Mode followed by normal boot resolves problems.

Not this does not always work for a wireless keyboard since im may not connect fast enough.

Try resetting the System Management Controller (SMC):

Desktop computers

1. Shut down your Mac, then unplug the power cord.
2. Wait 15 seconds, then plug the power cord back in.
3. Wait 5 seconds, then press the power button to turn on your Mac.

What happens when you try to enter a password

Is there a password entry box?

Does the Mouse and keyboard wor?

Try a USB keyboard maybe?

You are welcome. Come back if necessary.