I only took the OA definitely failed. One was similar to 3sum, another was a stack question and the last one was DP / Greedy. I haven’t studied much leetcode so it was difficult for me to do these problems

First, a recruiter screen phone call. Then, a technical interview asking LeetCode-style questions is usually just easy/medium difficulty. Finally, two rounds in one day, one behavioral and one "non-coding" technical, but expect to write code.