(Docs) Iterate Features pages

For Mobile, we recently (re)introduces Features overviews as separate Features pages. We realized that some of the content might be outdated - this issue tracks iterating and updating the content for these pages.

### Suggested Solution

Update Features pages - some ideas/input:
- add new features that are missing from the list
- point out which features are available/enabled by default
- point out platform limitations if applicable
- ...