The name may not be the right one, but the button at the bottom of the screen that is used to agree on the upload. The whole “bottom panel” is missing, I forgot what’s on the bottom right, but there is the delete button on the bottom left I think I remember.
The confusion indeed comes from the fact that I expected a big green button at the bottom.
The app version is the one available without restriction in China (but maybe not the only one) and no dark mode or anything special, it’s just the way it looks on this phone (Xiaomi 11).
Interestingly, everything loads on this phone, none of the map problems we spoke about a few months back, so now that I know where the upload button is, I like it like that!