I cannot seem to find any normal zombies, skeletons, creepers, spiders, husks, etc. They are replaced by an equivalent amount of unburied. If there is a way to allow normal mobs to spawn or if you could add an option to adjust spawn rates, that would be nice.

Unburied does not spawn naturally (only from tombstone or Undertaker). Did you use other mods to tweak mob spawning?

Try editing

"Spawn rate of Cemetery [1-10000]": spawn rate of Cemetery, higher = more likely to generate
""Cemetery spawns Unburied occasionally. [0-100]": spawn rate of Unburied in Cemetery, higher = more likely to spawn

in the config file "mod_lavacow.common.toml"

Unburied does not spawn naturally (only from tombstone or Undertaker). Did you use other mods to tweak mob spawning?

No. I had other mob spawning mods, but very few of them spawned either. there was about 3 sets of tombstones nearby but it didn't excuse the lack of other mobs or the sheer abundance of them in the desert. Regardless, I would still prefer having the ability to change spawn rates and maybe structure gen rarity.