So if they detect a trend early enough, they implement it as first-party feature, dry out the existing competitors while restricting new competitors to enter based on the App Store Review...
Apple isn’t using that rule to take down alternate weather apps, despite them having their own native weather app. There’s still plenty of QR code scanning apps, despite that being built into default camera app.
"Apps that copy basic iPhone or iPad functionality (including but not limited to its UI, gestures, core features) will be rejected unless the app provides a clearly different purpose or adds unique functionality."
Note the "basic" line. And there are plenty of Photos, Notes, Streaming etc apps so not seeing where this is being used to exclude competitors.
I enjoy apple devices but hate the walled garden.
There's a lot of fair criticisms of Apple, but they don't have to be absolutely first at everything or never enter the market.
This is also one of the things that makes a big difference between Windows and macOS when getting a new install/machine set up to basic usability. With the former, before I can get anything done there’s a whole laundry list of things that need to be installed and removed (which admittedly is now easier now that winget comes preinstalled), while that list is much shorter on a Mac. For me personally getting through that phase takes at least 3-4x longer under Windows.
As pretext, you can say the competitor's app is doing something now considered insecure or not privacy-respecting, or is not compliant with some new user experience or quality curation that you do.