There are some components to the interview you can directly affect, and some you can't.

By grinding leetcode, you raise the odds that you'll get a problem you've seen before, or at least similar enough that you recognize the way to solve it without having to waste time by starting from absolute scratch. I guess that's still luck, but this is one area you can increase the odds in your favor.

You can't change whether you get a hostile interviewer, etc. of course.