update old ipad

Hello, yes, you cannot update your iPad mini to a more lighter version than iOS 9.3.5, reason why is because the hardware is too old to run iOS 10 or later version of iOS because it wouldn’t support it, so practically, yes, your iPad won’t update and will never update

Yes

Michelle has a point there

your iPad is too old to run iOS or iPadOS versions

I don’t even try hacking your iPad

five syllables

that, wood, B, real, bad, so don’t even think about jailbreak on your iPad just to get on a higher version of iOS, it will damage your iPad

Yes.

Your iPad is too old to support any newer iOS/iPadOS versions.

Time to seriously consider a new or "newer" ( used ) iPad model.

Sorry & Best of Luck to You.