Is there any news on the ability to create dynamic providers using C#?

you mean more recent than this? https://www.pulumi.com/blog/dotnet-custom-providers/ Development has continued on it and you can try it out, although it’s not generally available quite yet,

This seems to apply only to the normal providers and not to dynamic providers?

Oops, you’re absolutely correct. I don’t have any new information on the dynamic providers but hopefully another Pulumian can chime in.

https://gist.github.com/Frassle/c4a568f92eced55c43772600a10d232c It exists, it's pretty experimental (given it's built on top of the experimental native provider stuff referenced above). I just need to find a few hours to set up all the github workflows to get the thing actually published.