I found my lost iPad unlock it please

You should be able to use either your device’s passcode, or possibly your AppleID password - depending on what the screen is requesting.

If you’ve forgotten your passcode, see:

How to remove your iPhone, iPad or iPod touch passcode without a computer – Apple Support (AU)

You WILL need your AppleID and password.

If your iOS was prior to 15.2, you’ll additionally need a cable and a computer to follow the steps linked near the bottom of the article.