@JumpedKitty6810 To address the specific problem of fixing muscle mass that you can't normally see, while you are in the salon there should be a button option (think it's RB for Xbox, no idea what it would be on PC) that will cycle through normal view, removing outfit/outerwear (just basewear), just innerwear, and lastly a sort of "built-in innerwear" so the characters aren't completely nude but have all "aftermarket" clothing removed. So no matter what you have on your character, using this option will strip them down enough to address muscle mass adjustments (although you will need the Salon Pass to make that adjustment, if I'm not mistaken).
And that's what makes this lack of a feature all the more confusing. In the salon we can literally strip down absolutely any created character down to purchased innerwear or even the in-game permanent default (wonder if they'll ever make that something we can put on our characters outside of the Salon), and then scroll down to the "Emote Test" option and have them do their little chair/pole dance all day long. Every player (or at least those who have those specific emotes) can do this. It's not like having our characters run around the lobby in their skivvies is going to "expose the children's virgin eyes" to anything they can't set up themselves already. I mean, yea, there is a slight difference between putting one character on a pole/chair in the salon for our own eyes, and walking into a lobby with like 30 different characters all shakin' their money makers. But only slight.
And it's not like NOT having this feature has made the area chat "tame" in any way. Don't know what ya'll see on ships 1 and 3 but on ship 2....some players are just straight up disgusting with what they're vomiting onto the screen for everyone to see. If Sega's holding out on this for any sort of ratings/censorship reasons, they really need to stop worrying about it and focus more on fixing THAT.