The thing is though he will never be able to get it eliminated over the years, what he needs is to eliminate it immediately so that it doesn't possibly fall victim to filibustering
Biden knows this, and wanted to ban it, but obviously he would not state that he'd ban it, that would make it even worse.
"“Just to clarify, would there be any place for fossil fuels, including coal and fracking, in a Biden administration?” Bash said.
“No, we would — we would work it out. We would make sure it's eliminated and no more subsidies for either one of those, either — any fossil fuel,” Biden said in response." try to find the "Eliminate fracking over years" in here