Mutated Items Add-on

What is the label I should put on the items so that the quartz crab gives me experience, since the one it mentions doesn't work for me?

Could you please design the add-on to avoid using experiments?

what this new update changes? (btw, this mod it's only for 1.21.130 or also work in 1.21.131?, looks like the same but 1.21.130 it's like a beta versión and 1.21.131 it's a bug fix)

i can throw more than 1 item at the time? and how, i throw them directly in the portal and the entities spawn in the nether? (also, the same ítems the mobs drops is the needed for get them again?)

the furnace and torch always follow You, maybe You can add the tame mechanic to them? (also, the redstonemite feels useless, maybe You can rework it, make it a redstone farm, but still agressive) (i'm Bad at English)

i found a few error, first of all: the way to makes mutated ítems don't works, i try many times, nothing (also You can update the descripción or make a book explaining how to make every mob), also the spawner mob don't spawn, the echo warden just throw your xp around (i continue in other comment)