Comment by A_D_E_P_T

There are quite a lot of them: https://en.wikipedia.org/wiki/Wikipedia:Signs_of_AI_writing

But it's really just the usual ones that are truly obvious. "Not X but Y," em-dashes, "underscores the significance of X," and so forth.

A terse sentence structure can be a tell, but, IMO, it's a weak one.