I recently was able to get back my 4th gen iPad that I used for university and got excited to start using it again just for basic stuff like searching stuff on the browser, reading comics and such. However I quickly realized that I was unable to download anything from the AppStore as my iOS version is 10.3.4 and apps like Firefox request at least iOS 14. This wouldn’t be an issue if I still had the apps downloaded but it isn’t the case.
I was able to re download a few apps through the Purchased tab on the AppStore but some of them are not available anymore (ComicFlow for example). So yeah… What now?
A couple of years ago I set up an old iPhone as a Spotify connect device (as in it sits in a speaker dock and I play music through it controlled by my phone). It was similarly unsupported but I found a not-too-hacky way of installing an older compatible version of the Spotify app via iTunes on a PC (which involved having to install iTunes and find an apple account). I imagine there are instructions both official and amateur available for you to follow, but hopefully you should still be able to install stuff on it. Just don’t do anything involving sensitive info as you’ll be out several years of security updates!