As a self described aroace myself, I'd say no, or at least not really since I'm nervous around everyone new I meet whether I find them conventionally hot or not.

No, then again I don't differentiate people by the looks because I don't see anyone attractive in the sense that allos do resulting me in having the same RBF all the time.

Not really. I obviously can't speak for all asexuals but I don't feel nervous around so-called "good looking" people. I used to get nervous around pretty much everyone but as I've matured into a more confident person it very rarely happens unless I am not in the mood for interacting with people

I'm not sure if I'm fit to answer this. I'm demisexual, which is considered to be on the asexual spectrum.

The answer for me is no. I smile awkwardly at everyone. I can tell when someone is traditionally attractive but I just feel nothing. I become nervous if it seems like they're up to something or are emotionally unstable or they have a lot of power over me or if I feel that other people are watching my interaction and judging me. Sometimes I get nervous cause I have those intrusive thoughts like "bite their nose, imagine biting their nose!" Similar to when your driving and you think "swerve into incoming traffic!"

I tend to mentally categorize people as cartoon caricatures in my head and there are certain caricatures I tend to like more because they match with caricatures from media. When I meet someone that matches a caricature architype I like, I think that's as close as I come to finding someone attractive without knowing them, but I don't act any differently when around them.

There was one time where I did feel instantly 'attracted' to someone. It was the strangest thing, I saw them and somehow got this intense and assured feeling that they would be an important part of my life. (She's my SO of 12 years now.) I didn't smile awkwardly (more than usual) at her or feel nervous. I just spoke to her as normal and then 2 years later I told her that I believe we would make a good couple due to several factors like political beliefs. It was not very romantic in hindsight. More like a scientific conjecture lol.

I hope that meandering ramble helps answer your question.