I have iPad mini 2 me277ll/a won’t upgrade

That model cannot support iOS versions beyond 12.4.8, because of hardware incompatibility, sorry.

Regards

Giulio

A first generation iPad Air can only be updated to iOS 12.4.8

Apple ended update support for iPad Air1 in September 2019. An iPad Air1 cannot be updated to iPadOS 13 (or any later major versions of iPadOS) as the internal hardware does not meet the minimum technical requirements for new versions of iOS/iPadOS.

Whilst you are unable to update your mini2 to a later version of iOS, the iPad is technically not obsolete, however, it will be limited in its ability to run recent versions of Apps.

Some App developers have dropped support for iOS versions preceding iOS 13.x for technical reasons (often because APIs or software libraries upon which they rely have been updated in the new version of iPadOS, making their App incompatible with earlier versions). 

Whilst many App titles remain compatible with your iPad Air1, if you want or need to access to Apps requiring the most recent versions of iOS, you’ll need to consider replacement of your iPad with a newer or current model that supports iPadOS13.x.

Sorry, I appreciate that this may not be what you were hoping to learn if you do, indeed, possess an iPad Air1.

I hope this information provides helpful clarity as to your available options - and the limitations of your existing iPad Air.