can't connect ipad to itunes and apple devices can't connect to asus laptop

If you iPad is not recognised when connected to your computer, try using a different USB port; if your computer has both USB-C and USB Type-A ports, try using the USB Type-A port of the computer.

If difficulties persist, this support page may help with troubleshooting:

If your computer doesn't recognize your iPhone or iPad - Apple Support

Be aware that iTunes for Windows has been superseded by the Apple Devices App - the latter now being required for Windows 10/11:

Download and use iTunes for Windows – Apple Support

Update to the latest version of iTunes – Apple Support

Apple Devices App (Windows PC):

https://apps.microsoft.com/detail/9np83lwlpz9k?hl=en-ms&gl=MS

If you don’t have access to a suitable working computer of your own, that of a helpful friend or family member will suffice. Alternatively, the technicians at the Genius Bar of your local Apple Store will be delighted to assist with restoring your iPad:

Genius Bar Reservation and Apple Support Options - Apple