Honestly I’ve done mostly forgot, and with the proliferation of AI technologies and all the typos AI has read from in the training models, I bet AI isn’t always right about this either.
I usually just don’t care anymore, whether the autocorrect puts the apostrophe in or not.
Don’t demand nitpicky references in triplicate from people who assumed you just wanted to know and didn’t understand you were out to normalize failing.
Go find a teacher. It’s that person’s job to show you why. If you don’t believe that person, then it’s an oppositional disorder you’ll need information on.