Earlier quoted context omitted.
The FDA doesn't tell people what to research, it tells the public what existing research confirms is safe to use. If a bunch of scientists think iverwhatever is viable they can do a proper study on it and get it published and peer reviewed. To "drop everything" would be criminally negligent, there's lots of things that can and should be researched in parallel.
Part of the problem that there is censorship on publishing in the big journals. That said, there are published RCT showing Ivermectin effectiveness. In my second link on my first comment, there's a talk about the overwhelming data, censorship and hindrances for publishing. Sharing evidence on Ivermectin - Dr. Tess Lawrie https://player.vimeo.com/video/554350476?autoplay=1#t=5756
https://ivmmeta.com links to all sorts of studies published on the effectiveness of ivwhatever, all as support for using it.
It sounds more like the rest of the research/medical community is just not convinced.