1.18.2 Hard Survival SMP -Xbox, PlayStation, mobile and PC users.

When you find an outpost there are pillagers, but once you kill them they do not respawn. 

Leaving the area, reloading the world, going to mob spawn distance, day and night, setting server from hard to peaceful and back to hard mode - nothing is working. 

It is not a mobcap issue, it does not matter how many players are in world- no pillagers will spawn.