For me on iOS: Double hyphens — Triple hyphens —- Actual em dash (typed with more effort, but HN changes it) — The triple hyphens has a gap in it separating

For me on iOS: Double hyphens — Triple hyphens —- Actual em dash (typed with more effort, but HN changes it) — The triple hyphens has a gap in it separating the autocorrected en dash and the hyphen.