Have definitely seen some act like this online

Yeah, sometimes I see butches do that, but usually it's a weird mix of "gender" roles. For example, a lot of butches I know of were raised in fairly strictly gender regulated households so they're really good at cooking/cleaning/childcare simply because those things were forced on them growing up. E.g. the bald woman dressed like a lumberjack will coo over babies like a soccer mom.

Also, I've almost never seen butches complain about not getting dates or anything like that, despite seeing a lot of fem4fem stuff.