No, though it could be the first character in a hashtag. A hashtag includes the characters that follow.
EDIT: The article I linked to says that in Canada, it’s typically called the “number sign”, in the US, the “pound sign”, and in the UK, the “hash mark”.
One might have an application-private newer build of glibc and set LD_LIBRARY_PATH to the directory containing it prior to launching VS Code.