Within one organization the form is standardized, and across companies it's very similar. But sure, maybe not the right word. I'm comparing it to "just letting the interviewers chat and decide based on whatever" which is typical in industries without a skills test.
Leetcode-style tech interviews fall far short of standardized tests. In real standardized tests, the same questions are given to everyone, and effort is made to develop new questions not known to the test takers.
They're more like a standardized test than a pure shoot-the-shit interview is, but still pretty far away.
...a standardized test? No. There are tests. They sure as heck aren't standardized.
Maybe they should be, since everyone seems to be doing the same thing.