Ok so I was able to download the game on the Google play store with my Samsung galaxy note 8 but whenever I try to load the game I get a connection lost message. When I looked at the compatible phones list mine is completely skipped over. Its not even on the non compatible phones list. So I am asking why can’t I play and why is my phone skipped over on both lists?

I have same issue with wizards unite. Note 8 not loading connect prompt reset. I dont have booster on. I cleared cache cleared data unintalled reinstall several different sources allnsame result
I have a Samsung Note 8. I turned off the download boost, restarted my phone. No luck!
Note 8, android version 9, 23 G free space on phone, connection lost error, won’t load the game.
I tried airplane mode, and it partially loaded. Looked up this article: https://heavy.com/games/2019/06/harry-potter-wizards-unite-stuck-loading-connection-lost-hpwu/ mentioned turning off download boost with a helpful link.
https://www.verizonwireless.com/support/knowledge-base-211186/
Please note that the method of turning download boost off is the same for the note 8.
Turning download boost off solved the error, it’s running on my phone now.
Hope this helps!

Edited original answer to include the update and the solution I found for the Samsung Galaxy Note 8.
I have the same issue, same phone, c’mon guys!