Greetings Mr..

AI content detection tools do their respective jobs, even though they are not perfect, in fact, the most popular anti-plagiarism tools also have their flaws.

What you should do in such cases is to investigate the suspicious content both with AI detection tools and also using the anti-plagiarism tools.

In my experience, AI detection tools always give me clues to fractions of texts that have been taken from other sources.

I am at your disposal for any suggestions.