Yet the EU got mad at android for ‘barriers’ to sideloading like this since it ‘unfairly’ makes it harder to install third party App Stores.

They'll lock it down like an iPhone soon enough. The writing has been on the wall for years. Apple and Microsoft are frothing at the mouth to do this. But they have to do slowly boil the frog, because they know it's the only way people will accept these kind of changes.