yeah, well he did notice but it's not like he'll say anything lmao. It's fine with stuff like hairstyle or nail polish, aka visual things. But I feel that with regards to scent, unless the girl brings it up themselves, it's very hard for a guy to bring it up without sounding creepy or weird. Yes, people love compliments but you never know how you will come across.
Reminds me of that scene from kaguya-sama: https://www.youtube.com/watch?v=LElYn28l7X0