Can't connect to server

Not sure if it’s on my end or what but I was playing a bit really early this morning (on wifi) then tried to play on my lunch break at work and I could not connect and I’ve tried several times in the last few hours. I have 3ish bars of 5g. Can I only play on wifi? Or am I missing something. I’m brand new to the game.

Update: I restarted my phone, the game, and re downloaded the game and nothing worked.