after update restore iPhone8 is unavailable for 60 minutes

An iPhone will disable for 1 minute after six failed passcode attempts in a row. The seventh incorrect passcode attempt will lock you out for 5 minutes, the eighth attempt for 15, and the tenth for an hour.

So you have to wait.

Then try again:

(< iOS 15.2) See this Apple article: If you forgot your iPhone passcode

If you forgot your iPhone passcode - Apple Support

(iOS 15.2 and newer) How to reset your iPhone, iPad, or iPod touch when you forgot your passcode

How to remove your iPhone, iPad, or iPod touch passcode without a computer - Apple Support