It isn’t too surprising that some things get routed over general domains that the company already owns. Probably the facebook domain since they bought WhatsApp way before they rebranded to meta.

This for once isn’t anything malicious. Dunno if I would call it best practice, but they probably don’t intend to unbundle WhatsApp in the near future.

I’m not even sure what that joke could’ve been

Educational entertainment, also referred to by the portmanteau edutainment

The word has been around since 1973 and is included in many dictionaries. If you want to correct someone, at least inform yourself beforehand.