Looks like the screen is there.. it’s above the rubber seal at the top.
I also see the screen in the top above the rubber gasket.
I purchased replacement screen and gasket / rubber seal from Aircraft Spruce. There were two different filter screens available. Either one will fit. I think I have the 74 micron filter on my airplane but also purchased the 120. Either one would work in my gascolator.
Looks like the screen is there.. it’s above the rubber seal at the top.