The crafting menu is off 2 Standard Sets (Legacy and Origins are fine).
(with “mythic” selected on the wheel for all of the below)
Eldraine and M20 both have “you have all cards in this set” even though I definitely do not.
WAR crafting shows the Eldraine cards I am missing
RNA crafting shows the M20 cards I am missing
GRM crafting shows the WAR cards I am missing
Legacy crafting shows the Legacy cards I am missing.
I do not want to waste Orbs to see if you actually craft a card from the wrong sets like it shows, but I’m going to assume that yes it does.
Nice to see the new update hasn’t given me any reason to start playing again.