Copy paste not working any more

Try a forced-restart of your iPad - as this will often clear an isolated software issue:

Force restart iPad (models with Face ID or with Touch ID in the top button)

If your iPad doesn’t have the Home button, do the following:

1. Press and quickly release the volume button nearest to the top button.
2. Press and quickly release the volume button farthest from the top button.
3. Press and hold the top button.
4. When the Apple logo appears, release the top button.

Force restart iPad (models with the Home button)

Press and hold the top button and the Home button at the same time. When the Apple logo appears, release both buttons.

If the problem persists, closing unused Apps can release system resources. While closing Apps is generally unnecessary, iPadOS 17.x appears to suffer an issue with its resource management - perhaps due to an unresolved memory leak.

Apps can be force-closed, if necessary, from the App Switcher page:

Quit and reopen an app on iPad - Apple Support

To expose the App Switcher, it is necessary to swipe upwards with your finger from below the active portion of the screen, to the middle of the screen - and pause briefly - before lifting your finger. Once visible, open Apps can then be closed by swiping the corresponding App thumbnail off the top of the screen. 

Alternatively, the App Switcher can be summoned by a double-click of the Home button on iPads so equipped.

not working with any app

or is it in 1 app like safari or the likes?