It's not just the official store. Google Safetynet, used by a whole lot of essential android apps such as banking apps (particularly essential in the EU after a

It's not just the official store. Google Safetynet, used by a whole lot of essential android apps such as banking apps (particularly essential in the EU after app confirmation became legally required for online transactions) and also completely unnecessarily by a lot of frivolous apps, prevents implementing apps from functioning in open/rooted android installs, unless you jump through a bunch of hoops to fool the app about the device's rooted state.