Ver - AdditionalPlacements-1.19.2-1.7.6

as we know, normally light can penetrate carpet(if the carpet is on the floor). but I think vertical and ceiling carpet doesn't recognized as carpet in this mod.

This is mostly likely a quirk or hard-coded feature of the lighting engine itself, as there is no code that would cause either case in either the CarpetBlock or AdditionalCarpetBlock classes.