Good luck distributing it "elsewhere" when it comes to iPhones.
Yes, even with the DMA forcing Apple to open up to alternative app stores in Europe, Apple still has a definitive say as to what apps can be published, and what those apps have access to.
Also, a lot of the time, a full blown app is unnecessary, or not practical.
The solution isn't to prevent functionality from existing - this includes browsers and web apps having access to certain aspects to the hardware - but giving the user absolute control over what they allow an app to do.