Suggestion

When I add an ingredient to a bookmark, I often do so to see its recipe more quickly (because I can't remember it).
However, an ingredient usually has many recipes and I can't easily find the recipe I need. Therefore, allowing recipes to be added to a bookmark may be a good idea.

It should provide a feature that allows players to quickly view recipes (this allows players to distinguish between different recipes) and jump to marked recipes when viewing them through the recipe bookmark.
It may also need to provide a feature to quickly transfer recipes.

I've basically implemented this in my mod Jei Utilities, but it's so invasive and I'm not very good at rendering that it can often be problematic.
Here is a demo of it:

But what is inside Recipe Gui is not necessarily a recipe, and some mod authors like to add information or even a multi-block display inside. So it may still need some modification. (Because I determine whether to add recipes by identifying their output, they may not have an output)

This is a cool feature.
It looks like @Buuz135 worked on something similar recently as well https://twitter.com/Buuz135mods/status/1555902527102672897
I'd be happy to integrate a polished version of this feature into JEI

I am adding support here #3574