You blink your eye and there are new FLOSS office projects.
First, LibreOffice is clearly splitting between Document foundation and Collabora Online/Desktop. See also current discussion on that here and here.
In the meantime, OnlyOffice are forked to Euro-Office. The main reason is to get European digital sovereignty.
Lots of users’ confusion ahead soon, I’m afraid. Some people still use and install OpenOffice, even though it’s dead effectively.