Can asking a friend out twice sometimes work? If the second time is a while after?

Please don't do this. Respect their wishes and move on.

I do respect her wishes. Hence why I haven’t tried anything since she rejected me. But I really love her and my feelings for her keep getting stronger.

Asking her again after a year is the very opposite of respecting her wishes. It's quite selfish and puts her in a dreadful position.

Don’t be a fool who can’t take no for an answer

I can understand if it’s someone you don’t know very well or if it’s just a friend you see in a group or occasionally. But in my case, I feel like we pretty much do everything a couple does together except the intimacy part.

Yes, because you are good friends. This activity is predicated on the fact that she isn't reomantically interested in you.

To answer your previous question, no, your wishes don't matter because you have already asked and had your answer, regardless of the circumstances.

No, this is a red flag that your 'love' for this person is turning much more into an unhealthy obsession, break the friendship, only time and lack of contact will clear your mind (it hurts but honestly holding onto hope that doesn't exist ruins you, speaking from experience)

Do you have reasonable expectation to believe she would have changed her mind in that year?

What’s an unhealthy obsession?

What’s reasonable expectation? Also what about asking her for feedback instead? Because at least that will help me in future with other people.

Not respecting her wishes and not being able to move on despite being rejected or her getting I was a relationship. Not that you have quite reached that level, but the longer you hold onto the hope that one day she might like you or that she liked you in the past, she rejected you in the past. It's not great for your mental health. And makes her feel very awkward and annoyed.

A reason to believe that she would have changed her mind. e.g. has she said something or otherwise given a clear indication that her feelings have changed on you since you asked her a year ago? If not then don't ask her.

Definitely don't ask her for feedback. Girls aren't like homework assignments; there isn't one correct answer that fits all! Just because you're not this girls type doesn't mean you need to change yourself or do anything differently next time.