At least for JavaScript, it seems like it still doesn't support Inline Variable. I can Extract Variable, but not Inline. Of course, that's a different matter than whether it's supported for Java. Last time I tried using the Java extensions for a non-trivial Spring Boot project, it was intolerably slow. I managed to convince a coworker to switch to IntelliJ after he saw the difference between my setup with IntelliJ and his with VS Code.
And you'll find other refactoring options as well, e.g. rename, extract...