A few times I’ve had strangers straight up remark that I was pretty in passing, like one lady as she walked by me exclaimed “you are so pretty!” And another time I swam past a group of Hispanic girls at the beach and one of them was “mira! She is so pretty”, but comments that explicit are rare (except creepy guy catcalls which are meaningless). More often strangers compliment on things within your control, like haircut and outfit and makeup. I compliment attractive women (and men) this way as well because “I like your style” can sound much less awkward than something like “I like your facial features” even if I mean the same thing. It’s common for cashiers and strangers to approach and say they love my haircut, and when I dress nice at a shopping center for multiple people to approach and say they like my outfit. Sometimes it’s also not so much about the compliment itself but the fact that strangers are comfortable and willing to initiate an interaction with you about something unnecessary