Okay, fair enough. Parsing is another level of complexity though. And still, the description and title are there, and they're 100% explanatory about the requirement of using a "while" loop. So not having a test for it, is not an excuse. But that's just how I see it, fine with me if you have a different opinion on that.

But would it be possible to do it from the CodeWars unit tests environment?

loop statement --while and do..while

That's the title of the kata...

You need to write a loop statement within the function that loops n times

...and that's the first sentence in the task description :) (But maybe the description changed after you posted the solution? Sometimes it happens in CodeWars...)

My solution wasn't flagged as insufficient by the test cases

It's impossible to write a test case veryfing whether you used a loop or not.

That's a clean solution, but has rather high computational complexity for sorting 2 arrays

You could make it even simpler with Object.values instead of Object.keys and thus avoid [] accessors

That's the nicest solution, but the task asked specifically to use a while loop, sooo...