Even though the pages were appearing (i.e. live on the web), WordPress did not consider them “Published”. I think this was an error in the database migration.
Can confirm that once I opened the page and hit “update”, the category would show up in WPSP.
Tom, you’re fantastic. Just want to take this opportunity to say I use many of your services (Generatepress, WPSP, Simple CSS) and love and recommend them all.
Thanks for making so many all-star products. Enjoy the new year ^_^