Possessive pronouns don't need apostrophes.
"It's" with an apostrophe can only ever mean "it is" or "it has".
"Who's" can only ever mean "who is" or "who has".
e.g: "Who's taken my lunch?"
but "Whose lunch is this? Your lunch, its lunch, hers or theirs?"
I never correct people, but sometimes I practise explaining things concisely, and so I'm so lonely and fed up with the lockdown that I'm ready to risk a pasting on AIBU. Do you think it's a good explanation, or are you annoyed that anyone should talk about something so trivial during a crisis? Or both? Or would you do it better?