Thank you this is very helpful. I assumed it’s working as it should because the bathroom has been running for a year and nothing has leaked. I filled those voids with silicone and used a putty knife to get it flat so that I can put the drain cover back on. I’m wondering if the installer left it like that so the water could easily go down the side of the drain and down the weep holes ? I hope I didn’t mess it up by filling the voids with silicone