Face lock and Password removal

That information is well documented in the Samsung Galaxy A13 5G A136 User Manual here.

Samsung Galaxy A13 5G A136 User Manual

To remove the Face Recognition data:

From Settings, tap Biometrics and security > Face recognition.

• Remove face data: Delete existing faces.
• Add alternative look: Enhance face recognition by adding an alternative appearance.
• Face unlock: Enable or disable face recognition security.
• Stay on Lock screen until swipe: When you unlock your device with face recognition, stay on the Lock screen until you swipe the screen.
• Faster recognition: Turn on for faster face recognition. Turn off to increase security and make it harder to unlock using an image or video of your likeness.
• Require open eyes: Facial recognition will only recognize your face when your eyes are open.

And to remove the screen lock password:

Set a secure screen lock

It is recommended that you secure your device using a secure screen lock (Pattern, PIN, or Password). This is necessary to set up and enable biometric locks.

1. From Settings, tap Lock screen > Screen lock type and tap a secure screen lock (Pattern, PIN, or Password).
You can choose from the following screen lock types that offer high, medium, or no security: Swipe, Pattern, PIN, Password, and None.

There are all your instructions for what you asked for.

If you don't know the password and your face isn't registered on the phone, that's a whole different question from what you asked.