Activation Lock

You either have to get your daugther to remove the iPad from her account:

What to do before you sell, give away, or trade in your iPhone, iPad, or iPod touch - Apple Support

If you no longer have your iPhone, iPad, or iPod touch

If the steps above weren't completed and you no longer have your device, use these steps:

1. Ask the new owner to erase all content and settings using the above steps.
2. If you're using iCloud and Find My [device] on the device, sign in to iCloud.com/find or the Find My app on another device, select the device, and click Erase. After the device has been erased, click Remove from Account.

Or If she will not do that contact apple, They migth be able to help you unlock it if you have the proof of purchase.

Contact Apple for support and service - Apple Support

Good luck!

As you’re being held “hostage” by the device passcode set by your daughter, you’ll need to proceed on the basis of a forgotten device passcode. You’ll need connect your iPad to either a PC (with iTunes installed) or a Mac (with iTunes or Finder - as appropriate for the installed version of MacOS):

https://support.apple.com/en-gb/HT211078

After recovering access to the iPad, you’ll want to Properly prepare if for re-use with another AppleID account. This will completely disassociate the iPad from you daughters AppleID account - and avoid future Activation Lock issues:

https://support.apple.com/en-gb/HT201351

Whilst you’re not yet in need of the following, should something go awry, the following information and links might prove to be useful...

If your device is Activation Locked, this help page will provide most of the information that you’ll need:

https://support.apple.com/en-us/HT201365

If you have forgotten your AppleID or associated password, these can be recovered here:

https://iforgot.apple.com

To recover your credentials, you’ll need access to one of the following:

• Your primary email address mailbox that corresponds with your AppleID
• Any of the secondary/recovery email addresses that should be configured for your AppleID account
• Any of the trusted telephone numbers (fixed line or Cellular/Mobile) that are associated with your AppleID

Unless you AppleID account has not been fully/correctly configured, or has been seriously neglected, recovery of the AppleID and password should not be difficult.

More information about recovery of your AppleID:

https://support.apple.com/en-us/HT201354

More information about recovery of your AppleID password:

https://support.apple.com/en-us/HT201487

When you recover access to your credentials, you would be well advised to log-in to your AppleID account from a web browser - and verify/update any email addresses and trusted telephone numbers:

https://appleid.apple.com

I hope this information proves to helpful in restoring use of the iPad.

That determination as to usefulness of information is entirely for the OP to decide - and, respectfully, is not yours to make.

Whilst having no reason to justify my entirely relevant response, for the benefit of clarity for the OP, provided information and procedures anticipate potential areas that you may need (or wish) to explore - if only to avoid potential future difficulties with your daughters AppleID and/or Activation Locks.

I just gave you my opinion based on what was written in OP's post. If you are going to add more information, at least make sure you know what the issue is. I might have been more blunt than intended, I am sorry for that.

Your apology noted.

Very often, additional and/or supporting information is useful in providing an expedited route to a solution - without protracted questioning. If the additional information is not needed, by the OP, it does no harm.

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The ipad has already been restored(no passcode anymore), and is activation locked to the daughters account. None of the steps you provided are relevant