Revisions Option Not Showing up

Hi, I can’t seem to find the revisions option ANYwhere.
I clicked “Screen options” but revisions isn’t an option. I just have: Raw HTML, Page Attributes, Featured Image, Easel, Page Options, Sharing, Custom Fields, Discussion, Comments, Slug, Author, Header
I’m the admin of the site; that hasn’t changed. What do! I was able to find revisions before!