Just so you know, text using the em-dash like that combined with a few other "tells" makes me double check if it might be LLM written.

Other things are the overuse of transition words (e.g., "however," "furthermore," "moreover," "in summary," "in conclusion,") as well as some other stuff.

It might not be fair to people who write like that naturally, but it is what it is in the current situation we find ourselves in.