Unrelated to the primary topic, but I have been trying out a new free (as in beer) app called lunacy [1] for prototyping and the experience has been great.
I am not a UX professional so can't comment on feature parity with Figma etc.
It was however interesting to discover that the native cross platform app was powered by dotnet core & the open source Avalonia framework[2]. It looks quite polished and the framework seems to have come a long way since I tried a few years ago.