Eh, the whole em dash thing is a low accuracy tell. Most of my writing uses em dashes; iOS/macOS replaces "--" (dash dash) with an em dash. Fwiw, in your exampl

Eh, the whole em dash thing is a low accuracy tell. Most of my writing uses em dashes; iOS/macOS replaces "--" (dash dash) with an em dash. Fwiw, in your example, an em dash is the correct choice, not a dash.