This thing is going back to Amazon. After I was finally able to get it to connect and display CarPlay yesterday, I tried again this morning and nothing. Tried a factory reset, tried the autoconnect toggle, tried resetting both bluetooth and wifi connections, nothing. Initially, it wouldn't connect to the phone's hotspot, now it finally does but doesn't start up CarPlay. I've tried in the car, on a laptop, etc. What a giant waste of time.
EDIT: Got it to work again after testing with my wife's phone, which had a name without a special character (mine has a dash). I then removed the dash from my phone's name and it worked again after testing. This was all on a laptop though, so I'll have to try again the next time I'm in my car.