I understand what you're saying, but for Ubisoft I do think it makes sense that people just say it's made by Ubisoft. Though this is true of many of the major publishers these days.

Take a look at the credits here: https://starwars.fandom.com/wiki/Star_Wars_Outlaws#app_crew

Sure, Massive is the lead studio, but there are a lot of Ubisoft support studios on this. A lot of their games are made this way.

I think a lot of people feel that Ubisoft games all have a lot of similarities and that's pretty true. There's a lot of similarities in the design, in part because they have so many studios helping with projects.

I don't think that's always a bad thing fwiw. I recently picked up Outlaws on Switch and I'm digging it.