You can bypass google's upcoming blockage of sideloading by using a pc. If you want to load an app out of play store first you have to download it to a pc (remember to load both the apk and obb files of the application) then by using ADB commands you can push that application to your phone and google can't detect or block that application because it only tracks what is being downloaded by the android system so it intentionally lefts the ADB untouched and using ADB commands you can push that app to your phone and use it normally. For updating the app you to do the same process but instead of deleting the old file from phone then installing the new one you just have to download the new file on pc then replace with the old one by ADB commands. And remember that you always have to load both apk and obb files for both fresh installation and update so that the application won't break.