ios updating to the last version

What is the “A” model number of your iPad?

The “A” model number of your iPad can be found on the lower area of the aluminium back of your iPad in small print letters right underneath the large, bold printed” iPad”.

Also, what iOS version is your iPad currently running?

What model Mini do you have? I do think that only the Mini 4 and 5 are upgradable to the current iOS. The other ones max out with earlier operating systems and cannot be updated any further.