Him pardoning himself for federal crimes isn't going to matter. We're already ass deep into the moronic "Lets come together and heal" messaging from Biden. Trump will never face any justice from the feds.
New York state, on the other hand? They're ready to hand trump his ass. They don't give a fuck about Biden's dumb "lets make peace with insane Q-anons" thing.
Not to mention his debt collectors, his taxes, and the rape case he's in the middle of where he's been refusing to give the court his DNA.
Something is going to stick, and he'll be fucked. Luckily we don't need naive Biden to do it.