How do I update my iOS from 12 to 16?

If you have an outdated iPad that cannot be updated to iOS 13 or later, many apps will not be able to download.

Outdated iPad no longer meets the requirements for many apps.

YouTube requires iOS 14 or later. 

Most apps require iOS 13.4 or later.                                

Considering a newer type of iPad?

Read this before you buy a newer type iPad.

You can update your iPad to the latest iPadOS version which it is capable of running by following these instructions.

Update your iPhone or iPad - Apple Support

That iPadOS version may - or may not - be sufficient to run any particular 3rd party application.

I prefer only responses that can provide solutions

Here is the solution for you.

The solution is: You need a newer device.