Sir, my iPad is showing Bluetooth unavailable

Begin with a forced-restart of your iPad:

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.

After restarting the iPad, if Bluetooth is still cannot be enabled, reset network settings:

Settings > General > Transfer or Reset iPad > Reset > Reset Network Settings

Additional information for pairing and troubleshooting Bluetooth:

Set up and use Bluetooth accessories on iPad - Apple Support

If you can't connect a Bluetooth accessory to your iPhone or iPad - Apple Support

If the problem persists, you may need assistance from Apple Support:

Official Apple Support

Alternatively and perhaps easier, you can initiate and manage your support cases using the excellent Apple Support App. If not already installed on your iPad, the App can be downloaded from the App Store:

https://apps.apple.com/gb/app/apple-support/id1130498044

You might also visit the Genius Bar at your local Apple Store or Apple Authorised Service Provider (AASP) - where the technicians will be able to test and assess your iPad:

Genius Bar Reservation and Apple Support Options - Apple