It looks like they are shifting their focus on lower level desktop features. And they expect flatpack to be the main way to get LibreOffice on RHEL down the line.
That makes sense IMO. Linux desktop is currently lagging behind for anything related to visual arts (design, 2D/3D arts, photo/video editing, ...) because of the lack of HDR support. And this despite the great tools available on Linux (Blender, Krita).
So if they stop supporting the LibreOffice RPM, knowing there are alternatives, to focus on such features, then why not.