Expected Results:
Anything that is Grass blocks or dirt will be converted into sand.

Actual Results:
No changes were made.

Datapack in Question:
https://github.com/Crystalis7/Hybrid-Beta/releases/tag/v0.8.3%2F1.18.2

Script to Test:
beach.txt

Additional Context:

Tested in a Singleplayer environment using Global Pack datapack loader mod.
Tested all stages prior to submitting bug report!
PRE_SURFACE,
POST_SURFACE,
PRE_CARVERS,
POST_CARVERS,
PRE_LIQUID_CARVERS,
POST_LIQUID_CARVERS,
PRE_DECORATE,
POST_DECORATE;