i made a snow texture that is connected to all blocks (see this)
so i made it in 1.21 and at first i didn't debug it in other versions and claimed it works as long as fusion mod is installed
but it doesn't
i tried it in 1.20 and it errored because the latest block list in 1.21 is not in 1.20
so my suggestion
ignore the block list in the block parameter without having to make it an error
q: "why do you have to do that?"
for higher compatibility with just one package
now i need to make each version of the resource pack for each version of minecraft
so if i want to make it compatible with a certain mod then i have to make an additional resource pack file
if i want to add one more mod i have to make another one
it's a bit easier if using Block Model Modifiers
but if you edit the blockstates then it will be more difficult