Also like #2 said, do NOT try to explain yourself. That comes off as being insincere and trying to justify yourself and make excuses. Even if they’re real reasons, people always take them as excuses. I know because I’m autistic and I over explain my thought processes when I make a mistake and people have gotten SO mad at me thinking I’m trying to make excuses. It’s just never a good idea.
If she hasn’t reached out to ask you, she likely does not care that much or wonder. If she has the ability to, and wanted to, she would’ve already. There’s no point in trying to think about what she would want. You aren’t with her. If I were her I personally wouldn’t care. She probably already wrote you off as a jerk if it was that bad, which can’t be fixed no matter what you say.
for example my ex broke up with me halfway through our florida vacation. He came back a month later trying to explain and apologize but I didn’t care anymore. Just never wanted to talk to him again. I didn’t want an explanation or apology. It was what he chose to do and I’d accepted it and moved on.