Sideloading is already painful. I tried installing Sora (which is not available in my region's Play Store). The phone didn't allow me to start the app (complain

Sideloading is already painful. I tried installing Sora (which is not available in my region's Play Store). The phone didn't allow me to start the app (complaining about integrity) unless I disabled the Play Store Integrity Checks. It wasn't straightforward in saying what the problem is and how can I bypass the check.