The only thing that Tony guy can nail Biden for is he attended a meeting with that Chinese energy company. So he can nail Biden for lying that he has never been involved in Hunter's stuff.
But apparently that business deal fell through and was never funded. No indication or proof of money ever changing hands.
Trump needs to focus on policies, lower taxes, no shutdowns, no 'defunding' the police, law and order. This Hunter Biden stuff while gets clicks doesn't seem to have much teeth to really bite. There is no 'Got Him', just like the Dems wasting time on that Trump impeachment. Spending too much focus on that doesn't seem nearly as useful for moving the needle at this point as the policy stuff. You run the risk with this sort of thing just energizing further the Left base to vote because they see something like this as Election campaign propaganda and trickery.