Does instagram notify when you screenshot a post? i keep reading both

Same goes for screen recording, it behaves exactly like a screenshot on all of those. And ignore any app that says it can tell you who screenshotted your stuff, Instagram doesn't share that with anyone, so those apps are making it up or after your login.

it doesn't. posts, reels, stories, profiles, none of them notify. the one place it does is disappearing photos or videos someone sends you in DMs (the view once / allow replay ones). screenshot one of those and the sender sees a little marker next to it. that's probably where the mixed info comes from.