Python actually has a good typed ecosystem these days, and unlike JS -> TS you don't have to add a compilation step to benefit from it: you just have to enable type checking in your IDE.

JS is in a different spot where to benefit from type checking you have to add a build step or reconfigure your build tool, switch files to another extension, add some "type stubs" dependencies, and make significant changes to the codebase to benefit from type checking.

I think if Node and the browsers started allowing type hints in their parsers you'd see much less resistance to TypeScript.

Other scripting languages are probably not popular enough to matter as much as JS does.