Jailbreak

If you are concerned that you iPad is jailbroken, ensure that you have an iCloud or iTunes backup of your data - then follow this procedure to completely reinstall a fresh copy of iPadOS:

https://support.apple.com/en-gb/HT201252

This procedure will reinstall the most up-to-date version of iPadOS/iOS that your device can support, reset the system and all settings to factory state - and, optionally, restore you data from your iCloud or iTunes backup.

That’’s it - done - clean - safe.

One other learning point; to keep your device secure, never divulge your AppleID and password or your device passcode to anyone. Keep your device under your control. If someone has access to your device and have your credentials, only then are you obviously at risk.

What security app are you talking about?

Please send us a screenshot so that we can see that alert message:_-> Take a screenshot on your iPad - Apple Support

Regards

Giulio

Was your iPad new when you bought it?

Did you jailbreak it?

Did you leave the iPad unlocked and with another person for 15 minutes or more?

~Lyssa

Well, McAfee is garbage.

My advice is uninstalling it.

If you really believe your iPad was jail broken, reinstall iOS.