Do I need to practice medium / hard problems Leetcode for this interview ?
What's PE interview?
Is this on-site or phone? For on-site, you definitely don't need leetcode: I'd say focus more on systems and networking side of the interview: the software part won't count for all that much if you don't do well on the PE specific parts of the interview.
Op, how is your prep going?
Do you want to buddy up? I am out of PM quota...