I know your issue
Some gamefiles are .zip even if downloaded from Android links
To install those games you need to change the file name from .zip to .apk
For example:
EXAMPLEGAME.ZIP is the name of the downloaded file
Press and sustain 2 seconds over the file untill some options appear at the bottom of your screen
To the right youll see 3 vertical dots
In there toull find the option to change file name
Then its just a matter of delete the letters zip
And write instead apk
Then your phone will be ready to recognize the file when you click on it (as usual install would be asked … instead of asking you to extract the files)
I hope itll help you