The official plot synopsis only briefly mentioned the daughters of Bill and Ted, but Solomon added a few more details about these characters.
You can take a look at Ed Solomon’s full interview with more details about Bill & Ted Face the Music over at Collider.
While the announcement featured an official plot synopsis, Ed Solomon offered his own synopsis that includes new details including Bill and Ted’s daughters, and more.
Solomon also added that while he could see the Bill & Ted franchise continuing with the title characters’ daughters, they are focused on this movie first.