Well, such could be said about Rust, TypeScript, or Zig in relation to Python. Not just Vlang. It may point to other factors at play, such as user satisfaction or enthusiasm. Python has a large number of critics, as well as fans.
As Python is a older language, its users may tend to go other places and look to GitHub less. There are many sites, not to mention Python's own, where people can download releases or get information.
There are other GitHub metrics to look as well, such as contributors or forks. In both of these, Python has a huge number in comparison to other languages.