It looks like I had to rebuild the app for it to surface. The owner field wasn't available for me to use in the gallery filter. It seemed to be connected to when Poly-morphic fields were enabled in power apps.
Can anyone help me with filtering the gallery? It looks like there needs to be a different formula now that poly-morphic lookups are enabled. I'm looking to only show the records where the logged in user is the owner of the record. I'm using this in the Item property of the gallery.