What are you talking about?
There is a Meta Logo Favicon, "Meta AI" appears in the header and "Meta AI" is purposefully centered in the ABF text. Registering a new domain costs $10 compared to the massive pain of involving legal with the permissions to repurpose a new domain. It's a new project so why not make a clean start and just get a new website instead of going through the full FB/Meta approval process on branding.
I mentioned the logo. I didn't mention the text because perhaps they still want to score points for Meta, so hiding it entirely wouldn't make sense. But they avoid the larger immediate hangups of the big logo and the domain name.
