There are plenty of other startups and established players pursuing NRC approvals for other reactor types. Here's [1] a list put of reactors that the DoE is working on (together with private partners)

[1] https://www.energy.gov/ne/articles/infographic-advanced-reac...

I don’t follow the industry that closely, but I know TerraPower (a Bill Gates vehicle) is actively doing things, including building out molten salt reactors.

nope. royce rolls SMR, Toshiba. Pretty much everybody invests in it.

There are others in US, but NuScale is the closest to a product.

TerraPower which is funded by Bill Gates.

Hope it wasn't keeping its payroll money in SVB.