On the mobile apps can check your SIMs country code. This is how bluesky knows the UK users (they used to use IP, not anymore)
What they can check is which region of App Store they were installed from.
I checked mine and it's a little bit weird - even with the physical Sim disabled and esim (from another country) enabled, it was returning physical sim data.
There's hope tho.
There's plenty on the roadmap from what I see, although this phone is infinitely better than with the standard OS.