There is almost no agreement on the rest of the agenda, though. Democrats and leftists want green initiatives and universal healthcare, which both have zero support from Republicans. The leftist wing of the Democratic Party will be emboldened by their successes this election and will hijack the agenda, forcing America to smack the new administration (and Congress) back into doing nothing by putting in Republicans during the midterms.
Republicans have much more discipline as a party and will work to obstruct, because that's what wins them votes. Why should they cooperate with a party that spent the majority of the past four years trying to impeach a legitimately elected President? In fact, they might start a similar effort, because the saga of Biden's ne'er do well son Hunter has barely begun. Trump is not going away, neither is Steve Bannon. They have a lot more time on their hands to team up again, possibly bringing Donald Trump Jr. into the fold, to build a grassroots opposition campaign to stymie the Democrat agenda. Remember that Trump has already made the Republicans' long-sought wish of a Conservative Supreme Court (for almost a generation) a reality. He has also given the Republican party a good number of wins in the House (+5/6 for Republicans vs +1 for Democrats). So from their perspective, it may make sense to ride the Trump wave some more, because it has delivered for them.