Sounds like you're a user in my workplace , but i've set it up so that users can install later versions if they want too.iPad OS 17 works very nicely on my personal 8 (17.3) and my office-supplied 9 (17.2 as it’s corporately managed). Battery life is good on both. The office 9 sees a lot of use for MS apps (Word, Outlook, Teams) and notetaking. I run it hooked up to a 24 inch HP monitor as an alternative to my meh-tactic HP laptop. My own iPad is used for GarageBand, the usual media consumption and as a Zwift head unit.
I have no option but to update my office supplied 9 because it will cease to connect to our corporate system unless is in compliance with the security policies. We’re usually one step behind on point updates to allow for internal testing.
Just curious, how are you hooking it up to the external screen? And is it "mirrored" screen you get then?
If you do like to hook up the iPad to an external screen, se if you can get a newer iPad with USB-C such as the Air or pro, they work really well using external screens.