Uh, self-explanatory. 5.1.0.
Tried /recipe give @s map_atlases:craft_atlas myself just to be sure, but attempting that said "no more recipes were learned."
On the contrary, attempting /recipe take resulted in "no recipes could be forgotten." So it's... there, but also not there.

Forget about the command. Can you craft the atlas or not? Filled map + book + slimeball

Ah, yeah, I guess that would be a helpful tidbit of info to include. Yes, all recipes work fine, just don't show in the recipe book.

They are special recipes just like vanilla banner duplicate or map clone. Those don't appear there either. That's why I have jei integration

And ita not up to me how the recipe book works it's very supid and only shows shaped or shapeless crafting. Nobody should use it when playing modded

They are special recipes just like vanilla banner duplicate or map clone. Those don't appear there either. That's why I have jei integration

Ah, alright, I had thought that might be the case. Thank you for clearing it up.