I can’t remember my Apple TV password

my Apple TV box

What is you model Apple TV box? Identify your Apple TV model - Apple Support

If you are asked for a four digit code, then it is not asking for your Apple ID password.

• If asked for a Restrictions PIN code that has been forgotten, then you may have to reset the device.
• If asked for a pairing code, then that would be displayed on the screen of the other device.

Use Restrictions on your Apple TV - Apple Support

Pair your iOS device or Mac with your Apple TV - Apple Support

Use AirPlay to stream video or mirror your device’s screen - Apple Support

Set up the Apple TV Remote on your iPhone, iPad, or iPod touch - Apple Support

I can’t do screen mirror on my sony tv. Asking for password but haven’t set one up.

First set up AirPlay and HomeKit on your AirPlay-enabled TV, including setting up a password (or disable that requirement).

I can’t do screen mirror on my sony tv. Asking for password but haven’t set one up.