This ^. I’m surprised most people don’t realize this.

After a certain level, leetcode is 30% of your interviews. Your level is decided by system design and behavioral, which IMO you’ll do naturally better at with experience

Your level is mostly determined by years of experience and level of previous positions. Your level might get down adjusted if you perform badly on these interviews, but it wont get adjusted up if you perform well. And passing these interviews is trivial if you actually did your job and didn't waste your years of experience, so the limiting factor is still mostly leetcode and years of experience. (Although experience at better companies is valued higher)