Python doesn't have a standard, but it has a canonical implementation, so maybe a "defacto standard". Not having an official standard didn't matter, though.

Common Lisp has defacto "standard libraries" for things like threading. Other things, such as async, are less clear (to me), but libraries do exist. Just because something isn't in the standard, though, doesn't mean it can't exist. Also, implementation such as SBCL pick up a lot of the slack, filling in some of the missing gaps.