Cant log into ipad dont have ID

You have an Apple ID.

You are sign in here .  .  .  with your Apple ID & Password.

You can’t merge multiple Apple ID accounts.

See -> Sign in with your Apple ID -> Sign in with your Apple ID - Apple Support

Have you forgotten your Apple ID?, Check your Apple ID via your email box, see this Apple article: If you forgot your Apple ID -> If you forgot your Apple ID email address or phone number - Apple Support                  

OR see -> Having trouble signing in? -> https://iforgot.apple.com/password/verify/appleid

See also -> If you can't connect or sign in to iCloud

If you can't connect or sign in to iCloud - Apple Support

Have you forgotten your password?, see -> Change your Apple ID password -> Change your Apple ID password - Apple Support

Then see this Apple article: What to do after you change your Apple ID or password

What to do after you change your Apple ID or password - Apple Support

Or do you need your Passcode?

To unlock your iPad, follow the steps described in the Apple article:

(< iPadOS 15.2) If you’ve forgotten your iPad passcode

If you’ve forgotten your iPad passcode – Apple Support (UK)

(iPadOS 15.2 and newer) If you see an iPhone or iPad unavailable message or Security Lockout screen

If you see an iPhone or iPad unavailable message or Security Lockout screen - Apple Support