Does describing a woman as 帅 (shuài; handsome) imply she is mannish?
帅 can also mean cool.

Even when referring to men it doesn’t necessarily equate 100% to handsome because it could also mean cool as well based on the context.

Phrases like: 太帅了 also mean cool not handsome.

Most likely when used with a woman it just means she’s pretty cool.

If people were going to be mean and say a girl looked like a man they’d probably say something like 男人婆.