Who would've thought? This isn’t going to fly with the EU.
Article 5.3 of the Digital Markets Act (DMA): "The gatekeeper shall not prevent business users from offering the same products or services to end users through third-party online intermediation services or through their own direct online sales channel at prices or conditions that are different from those offered through the online intermediation services of the gatekeeper."
Friendly reminder that you can sideload apps without jailbreaking or paying for a dev account using TrollStore, which utilises core trust bugs to bypass/spoof some app validation keys, on a iPhone XR or newer on iOS 14.0 up to 16.6.1. (ANY version for iPhone X and older)
Install guide: Trollstore
No they don't, at least not necessarily. I had the xiaomi.eu ROM on my old phone and it broke SafetyN*t checks, and as a consequence at the very least one of my banking apps refused to work (this one I actually need to verify credit card charges in some cases, it's not just a nice to have unfortunately).
I probably would have been better off rooting it since then you can bypass it I think, but I didn't want to have to reapply root after every update.