Anything added to the list of blocks which affect sanity by standing near is entirely ignored. Everything other than the campfire has no effect despite being defined otherwise.

In config:
blocks = ["minecraft:campfire[lit=true];0.8;6;false", "minecraft:soul_sand;-0.5;3;false", "farmersdelight:cooking_pot;0.8;4;false"]

The result is the campfire (default) affecting sanity as usual, while the soul sand and cooking pot do not.

Same on 1.20.1 and 1.18.2 according to #37

it works for poppy and dandelion at least.

but I would like to gain sanity while being in my honey block or being above stone bricks.
This way I could encourage players to create an arena when fighting the boss inside my modpack because currently you lose your sanity really quickly in a boss fight