The country is split. Biden has no more ability, and no more interest, in uniting the country than Trump did. Or Obama did. Or Bush or Clinton or...
The sad thing is, he thinks he can unify the country - just like he thinks, unaided, he can find the bathroom. Then Dr. Jill takes him by the hand and escorts him to the Oval Office toilet. She pats him on the hand when he's done, zips his fly, gives him his butterscotch pudding, and all is well with the world.