There's no evidence because there's been no investigation yet, even though everybody knows it happened. The question is how can you not know?
There are two investigations, and one has been going on for over 3 years.
US Attorney Delaware David Daniels was assigned to investigate Hunter Biden over 3 years ago, assigned to the task by Bill Barr, and now with the consent of Joe Biden, continues to investigate to this day, and has yet to pin anything on Hunter, and since Rep Comer's investigation is based upon that laptop, nothing he has produced is direct evidence to Joe Biden doing anything illegal. What remains are private citizens doing business abroad, which is not illegal.
Did Hunter make money off of his father's name? He admits it. So do a lot of adult children of famous people, Ivanka to name a view. You think Ivanka would have made $87 million selling chinese goods to China, from an accelerated trademarks she got from China because her father was President, if her father were not president nor famous?
Do you think Jared Kushner would have got $2,000,000,000 from Mohammed Bin Salman, and earned a 1.25% management fee, equallingi $125,000,000 big ones if his father-in-law were not president and did not have a hotel in Saudi Arabia? Does anyone want to investigate them? Both Ivanka and Jared were SENIOR WHITE HOUSE ADVISORS but Hunter Biden is PRIVATE CITIZEN. But, and, Ivanka and Jared aren't a problem, but Hunter is.