Has the site layout changed in the last 12 hours or so?
Used to see my own username and vote counts when browsing which would also serve as a link to my own profile, however that's been removed/replaced and now needs the left swipe sidebar navigation for that purpose - which doesn't always work, meaning it's not only a far less visible option but also far less effective.
There's nothing in the last 2 weeks on the changelog win [unless I've misunderstood what that is meant to be], and given this wasn't an issue the last time I checked here on mobile [under 14 hours as I remember checking a thread that is now that old] something seems to have changed with no notification.
Long story short, communities.win tends to run a newer version of the site than kia2 does.
There were mobile changes a while back, that have made their way down the pipeline and are now here on this site.
In the sidebar there's the version that any particular .win is running (as of right now on this site: v1.2.1.16).
There was a sweeping set of changes in 1.2.0.0 - https://communities.win/p/11R4NtSyCi/mobile-ui-and-dark-mode-update/c/ , as well as a few minor changes since then.