I have a wireless projector that's running Android TV (it's an Anker Solar Portable) that I am trying to connect to my school's network (I am a teacher). We have a PEAP, 802.1x or whatever enterprise network so it needs a username AND a password. The IT department have confirmed that they're happy for the projector to be connected to the network - IF anyone can actually do so.
After several hours of Googling and attempting stuff, I SUSPECT I am going to have to root the projector so I can manually edit the wireless configuration and add the relevant information - Android TV does have the functionality for enterprise networks built in so if I can just add the right configuration it should be okay. I'm a bit daunted by this, however - it's been years since I rooted a phone, and at least phones are relatively normal rather than a wireless projector with its own bespoke app store alongside the Google one!
The apps that hobbyists seem to have been written in the past to get round this issue no longer seem to work (delisted from the Apple Store and APKs either don't run or don't work).
I've read a bunch of Reddit posts from years and months past that seem to suggest this isn't going to be possible... but I thought I'd check one more time before I take any more steps in case there's an easy way of doing this I've missed. If only I could just ping across the connection settings from my phone (Pixel 3!) really easily, or I could edit the relevant file without permissions, or... I thought I was making things easier by buying an Android TV projector rather than one of the WebOS ones I was looking at!
It's not clear to me what you've tried yet but if this were me in this situation, I'd attempt to get a regular android phone connected to the AP first and if that works, I'd attempt to get a hotspot working on the phone for the projector to use before trying rooting the projector. I've never tried to get an android hotspot going with an enterprise AP.. it might work.