Removed troops from Afghanistan (though Trump gets half credit for that one too, it was his timetable and his plan that Biden executed -- poorly -- though that's likely due to soft revolt on the part of the military leaders)

Surviving four years without starting a new boots on ground war (also Trump gets credit for that)

Calling out china on its bs (also Trump gets credit for that)

In practical terms the big differentiating factor between Biden and Trump terms is that trump is soft-pro-putin and Biden is anti-putin. And trump freed some black prisoners who probably shouldn't be in jail anymore

Moving forward, Biden is likely to be pro-taiwan and trump has been making anti-taiwan rhetoric