CRA was never a fully official project, though there was a lot of confusion around that. It was in a weird semi-official state, it certainly had the endorsement of the React team initially but it didn't have actual resources from Meta behind it.

CRA was useful when it first appeared because the whole space was a big mess. But it very quickly outlived its usefulness, and its approach was really problematic in my opinion. The config was too complex to eject and modify compared to what you could do yourself with Webpack directly.