Andriod - Open Files & Accounts Optional
The Musescore app for Andriod requires you to have a Musescore app to use and can only view music uploaded by users. Please allow the andriod app to open mscz files and play them in the app and not require the user to sign into a Musescore account.
Comments
The Android (and iOS) app allows for this already, if you pay for it, a monthly/yearly subscription.
But questions and discussions about this don't belong here, they should go to musescore.com and https://musescore.com/groups/musescore-android/