In Publisher, once I choose a style for selected text, it won't undo by keyboard shortcut.
(Windows 11 / 2.1.0.1714)
It will undo by menu Edit > Undo, but CTRL-Z does nothing.
CTRL-Z does work if you click back on the document, but it takes twice since the first undo is re-selecting the text. Same with either paragraph or character styles, and the same if you've applied a keyboard shortcut for the style and applied it that way.
Works as expected in 2/non-beta.