My unlearned tab shows many missing recipes for my Engineering, including a number that I can’t learn. If I choose Goblin specialization, all Gnomish specialization can’t be learned. Yet the tab shows I am missing those. Is there a way to hide unlearnable recipes? ie goblin engineer will not see gnomish only recipes?
Nope. Been that way for a few expansions. Technically, they are unlearned therefore the UI picks them up. There might be an addon that fixes that, but the basic UI will always show them as unlearned.