Unable to factory reset my iPad

What issue are you attempting to resolve with a factory reset/restore?

A factory reset - if needed - is performed using a Windows PC (with iTunes for Windows installed) or a Mac computer (with iTunes or Finder - as appropriate for the installed version of macOS).

Restore your iPhone, iPad, or iPod to factory settings - Apple Support

You’ll need access to either a Windows PC (with iTunes for Windows installed - or the more recent Apple Devices App) or a Mac (with iTunes or Finder - as appropriate for the installed version of MacOS).

Download and use iTunes for Windows – Apple Support

Update to the latest version of iTunes – Apple Support

Use of a PC or Mac computer is unavoidable. If you don’t have access to a suitable 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 or Apple Authorised Service Provider (AASP) will be delighted to assist.

Genius Bar Reservation and Apple Support Options - Apple

If you're having trouble factory resetting your iPad, try holding down the power and home buttons simultaneously until the Apple logo appears. Keep holding until the recovery mode screen pops up. Then follow the on-screen instructions to reset your iPad to factory settings. If this doesn't work, you might need to contact Apple Support for further assistance.