how to enter my passcode when iphone 7 is

See this Apple support link→If you forgot the passcode on your iPhone, or your iPhone is disabled - Apple Support

Or watch this companion video ⬇️

EugeneAskWhy wrote:

You can’t enter as its disabled you must restore to factory settings using iTunes make sure you had backed up if not you will lose all your data.

You can't back up an iPhone that's disabled.

You can’t enter as its disabled you must restore to factory settings using iTunes make sure you had backed up if not you will lose all your data.