I'm not claiming that these are all the good things the GOP has done in the last four years, but these are the things some reasonable people could support.
- moving the US embassy to Jerusalem.
- reshaping the federal judiciary with originalist/ textualist appointees
- The fist step act which marked the first major legislative win in decades to address mass incarceration at the federal level, overhauled certain federal sentencing laws, reducing mandatory minimum sentences for drug felonies and expanding early-release programs, made retroactive a 2010 federal sentencing law reducing the sentencing disparity between crack and powder cocaine offenses, and aimed to lower recidivism by offering more rehabilitation and job-training opportunities.
- defeating Isis.
- a decline in illegal immigration.
- The US becoming a net exporter of oil, which makes it less dependent on Russia and Saudi Arabia.
- Fast-tracking of vaccine research as part of Operation Warp Speed
- Greater role for due process in university Sexual Assault/ Harassment investigations
- A cap on SALT deductions for the wealthy who previously had the federal government subsidize their state and local taxes
- Space force
When it comes to state governments, we can also consider that even though there's a relatively even split in the number of Democratic and Republican Governors, the Republican Governors are the most popular, in red states (Wyoming, North Dakota, Arkansas) swing states (Florida, New Hampshire) and blue states (Vermont, Massachusetts, Maryland)
https://morningconsult.com/governor-rankings/