Is that even what was claimed? It was said that Ivermectin was an ionophore which helped the body absorb zinc that was taken with the Ivermectin to help the immune system. Quercetin was largely talked about as an alternative to Ivermectin back in the day as another zinc ionophore:
https://freerepublic.com/focus/f-chat/3987635/posts
Ivm is not a zinc ionophore. HCQ is (as well as ECGC).