i doubt this is actually a bug. i would suspect it’s just a matter of what stock Android is capable of vs the custom apps created to leverage the special capabilities of each phone. i suspect it would not be reasonable to ask iNat developers to try to handle all the various custom capabilities across all of the different phone models out there. if you can take better photos with your phone’s camera app, i suspect that’s the best way to start an observation. then just share your photos to the iNat app.
otherwise, i think the gist of what you’re wanting is covered by an existing feature request: https://forum.inaturalist.org/t/use-all-modes-of-phones-camera/21636.