Are scammers using sideloaded apps when they can use whatever remote connexion the apps in the store allow ?
I think a big warning in red "Warning :If you don't personally know the person asking you to install this app, you are getting scammed. No legitimate business or Institution will ask you to install this app"
Why would you need to sideload anything when scammers can just use Teamviewer or any remote operation software, readily available in the Play Store, that will surely pass whatever "checkmark" process Google uses to validate "safe" apps?