Outlook web for Mobile Site doesn't offer Sensitivity Labels

I'm curious if anyone else working for a business that uses Sensitivity Labels has noticed that Outlook web for mobile doesn't support or enforce labelling.

I think it may relate to a recent issue where Outlook mobile app stopped supporting Sensitivity Labels. The issue has now been fixed by Microsoft, but not so for the web version of Outlook on mobile. If I switch to 'Desktop Site', the feature returns.

I've tried this on Edge for iOS, Edge for Android, Google Chrome & Safari, all give the same result on multiple devices, fully managed or BYOD.