first of all those who work on their phone Note 9 is the best option then note 10 but those are into more videos social media and gaming note 10 plus is the perfect device anyway .... samsung never give a brand value of use products ... anyone buy n...

s10 and note 10 then note 9 and I think after that other devices such as s9 and ect

play it on google play service and it will be fine that way

Take the device to nearest service station I think it have some software issues

try to play the game I minimum settings yet I recon u should have problem with s9+ unless it's a 4GB ram variant .... anyway please make your phone visual settings to HD + and play thr game in low frame rate also make sure the phone frame rate is 60...