Argentina: SMRs are under construction in Argentina
Canada: SMRs are under construction or in the licensing stage in Canada
South Korea: SMRs are under construction or in the licensing stage in South Korea
United States: Holtec is working on SMR projects in Michigan and New Jersey
Rolls Royce: Rolls Royce has memoranda of understanding with Estonia, Turkey, and the Czech Republic
As far as I know Holtec is working on restarting existing mothballed nukes in Michigan and New Jersey.
It is my understanding that the only SMR licensed in the US is the Nuscale reactor.