A giveaway for detecting AI-generated text is the use of em-dashes, as noted in op - you are caught bang to rights!
Not long ago, a statistical study found that AI almost always has an 'e' in its output. It is a firm indicator of AI slop. If you catch a post with an 'e', pay it no mind: it's probably AI.
Uh-oh. Caught you. Bang to rights! That post is firmly AI. Bad. Nobody should mind your robot posts.
Some keyboards and operating systems — iOS is one of them — convert two dashes into an emdash.