This is harder than it sounds. Look at the amount of effort it took to standardise temporal (new time library) and then for all the runtimes to implement it. It’s a lot of work.

And what’s more, people have proposed a standard library through tc39 without success - https://github.com/tc39/proposal-built-in-modules

Of course any large company could create a massive standard library on their own without going through the standards process but it might not be adopted by developers.