This Biden/Ukraine thing is as bogus as the "Uranium 1" nonsense. Absolute bullshit, made up 100% for political purposes.
There was a time when, after a possible scandal was thoroughly and utterly debunked, people would move on. Not anymore.
Facts don't matter. Just wait and see - Trump will keep talking about this utter bullshit, because he knows his followers are just too busy, or too distrustful, or too stupid to believe anything else.