The only mods are Fabric api and Fabrication.

Create world and for comprasion i located ancient city
The fog spawns below Bedrock as on picture included.

Version:
fabrication-3.0-pre6+1.19.jar

forgot to include this picture. The fog ends on bedrock, it wont go up

1.19

1.4

as far as i can tell void fog particles are identical to how they ware before removal
(minor diffrences including it not bugging out at high coords anymore)

it might feeel diffrent because i didn't get around to adding the actuall fog closing in?

Yeah , and honestly i thinkit feels different since mc has now different depths, so i were expecting to see a bit of fog in the ancient city

Void fog is out of scope for the void particles feature. Closing as a feature request, as it seems the particles are in fact accurate; they just seem different without the fog. (Though this may get added later anyway)