I don't know that the "mountain of evidence" that they're claming is real. It doesn't help when "whistle blowers" go missing. It doesn't help when we don't have confirmation of the evidence from independent sources. It doesn't help when evidence is not brought out in the light of day when the other side of the story can also be heard.
Bottom line: Whether it's Biden or Trump, "reports" and accusations don't mean shit. It may be that, if a law enforcement body is not acting, the evidence is not as strong as we were led to believe.
Again: If Joe or Hunter or Trump are proven to have broken the law, nail them. Make an example of them. Maybe they'll all end up as bunkies in the slammer, for all I care. This would be a fine time to clean house. But I don't believe "reports" and accusations for sure until they have been challenged in public. Indictments are a damn good start.