I really wouldn’t know. In this context I assume it means it is not deployed like traditional mobile networks are. The missing components being the hardware side like putting up towers etc.

They said Google has a monopoly using their own Jio virtual carrier. They never said Jio doesn’t support RCS.

The summary doesn’t even mention Mozilla’s complaint.

The summary was Mozilla’s statement on the changes.

Search the same term on multiple search engines and got consistent results. I think what you’re looking at is more of a suggested search term than them actually changing your search.