I didn't realize that was a flag for AI. I usually look for common phrases and words that AI outputs like to include. Things like "In the depths of internet" I've seen multiple times when writing about about the web, for example.
I'm glad you were able to find someone to help get past the AI mimic syndrome. Your experience is very helpful for others.
Also, more often than not, non-native speakers have a better understanding of the language than native speakers. Your stories are always interesting and I wouldn't flag you as being someone with English as an additional language.