Are we supposed to believe that Trump pushing for a foreign nation to investigate a political rival during an election season wasn't an abuse of Trump's position?
Sure, go ahead and convict Biden if you like. Just make sure you convict Trump of the exact same crime. Certainly there's no way to acquit Trump without also acquitting Biden.
BTW, the Ukrainian prosecutor, Viktor Shokin, allegedly investigating Hunter Biden was a creature of Viktor Yanukovych. Yanukovych was Putin's carefully installed puppet, who fled to Russia when ousted by the people. If you expected anything resembling "justice" from the corrupt Yanukovych regime, then you live in a dreamland.