You can place soul fire on non-full blocks when in soul_fire_base_blocks blocktag

Soul fire can be placed on top of partial/non-full blocks when they are added to the soul_fire_base_blocks.json block tag.

Steps to Reproduce:

1. Install the provided datapack into your world:
   soul_fire_base.zip
2. On a stone stair or slab, use flint and steel on top of it

Observed:

The fire will place, appearing to float above the block.

Expected:

The fire would not be placed, as it does not have proper support.