A lot of things are quite “fun” to add Compatibility for. GalaxySpace added 5 types of Glowstone Blocks back in the early 1.7.10 Versions, then someone took over and there was only 1 Glowstone Type left afterwards. Including the Vanilla Glowstone Type that makes 6 different Glowstone Materials to work with when doing Recipes. (“glowstone”)
Plenty of Mods also add alternate Redstone Items, like Erebus having a Redstone Gem (that can be crafted into Dust just fine unless you’re lazy), Actually Additions has the Redstonia Crystal (which is a different Material, but hey it should also be usable as Redstone in Recipes according to Greg XD), and I think in later MC versions there would be that random Redstone Crystal that would count for this too. Ofcourse all of these should be somewhat compatible in Recipes without having to grind them up in a Mortar or something. (“itemRedstone”)
Oh right and the different versions of Crying Obsidian from Netherite Plus, Netherlicious and Et Futurum. Because those are ofcourse not interchangeable. (“cryingObsidian”)
Edit: Note that those Mods ofcourse dont register the mentioned OreDicts themselves, I do most of that myself. But I think these 3 cases should be the most relatable for you XD