While using "Mobile mode" I cannot undo bad edits directly from the revision history, in order to undo an edit one first has to click on "Desktop version" and then click on "Undo", this seems like a major hassle for (us) mobile editors.
= Undo feature on desktop
= Interface on mobile
= Developer notes
This is just a matter of this feature never being prioritised and built.
I agree it's a huge hassle for editors who commonly have to undo vandalism. There's an opportunity to make reverting possible on mobile either from the history page.
Note: undo functionality is not currently supported by mobile (it tells you via a popup alert!)
although it does seem to be ''possible''.