I think that the Crafter's Insight spell should also provide a bonus to Engineering.
I'd second this. I think it's probably meant to since the description says a bonus to tinkering, but it doesn't currently provide a boon to engineering. A little bit of evidence below.
(https://cdn.discordapp.com/attachments/727948454764216433/1142824252152754197/20230820144956_1.jpg)
Pre-Casting (note Cooking):
(https://cdn.discordapp.com/attachments/727948454764216433/1142824252433764352/20230820151049_1.jpg)
Post-Casting (note Cooking):
(https://cdn.discordapp.com/attachments/727948454764216433/1142824252802871316/20230820144552_1.jpg)
The description makes me think this might be a bug and not something intended