There is an increasing movement to find European or OSS solutions. GitHub can be replaced by GitLab. Azure by any of a number of European cloud services. Some are more difficult, but Visual Studio can at least be replaced by IntelliJ.

I don't understand why you name things like Typescript. Microsoft may have created it, but afaik they do not assert ownership. You can certainly write Typescript in non-MS IDEs.

How much Visual Studio can be replaced by InteliJ, depends on the underlying programming stack.

If it is to write Windows games in C++ that are then consumed in Linux via Proton, is a kind of Phyrric independence.

Who pumps the money into the Typescript team, and calls the shots on its evolution?

Naturally you can have your own compiler and trail behind its development, with the sponsorship of the likes of Vercel or Anthropic.