Title pretty much says it all, trying to overwrite recipes via a datapack for my modpack with no little result.
I use DRP - Global Data Pack [by JTK222] in my modpacks for getting datapack info loading in player created worlds, and it creates/uses a folder at .minecraft\global_data_packs\ for this purpose.
I've found that if I put the datapack files into the saves\ {world}\datapacks folder, then I can change only the "minecraft:crafting_shaped" recipes, not the special block-upgrade recipes.
My biggest issue with that method is making players take extra steps outside the game to get the intended recipes for a modpack.

I understand the need for special recipe handlers when dealing with items that will definitely have .nbt tags in the 1.13+ systems, but could there be a method available for customizing those recipes? [see comment below]

Dank Storage 1.13a
Forge 28.1.104
globaldatapack-1.14.4-1.2.1

After further testing, I've found that CraftTweaker actually provides customization capability for at least the normal recipes. You're custom recipe types don't show up with /ct dumpBrackets (which generates a file listing all recognized recipeTypes).

hmm, the recipes are hardcoded because I didn't think anyone would want to tamper with them, and I have not found a way to make them datapack friendly

got it

I'm one of those "Pack Author" weirdos that really likes fiddling with things... Notably one that insists on conformity to his own sense of "balance/accessibility" guided by the theme of the pack. 😁

Thanks for the fix!