https://docs.google.com/spreadsheets/d/1l4j1YMf6ktb44CY4sEFxzqSc__EYqGvRU1W2kMiKIq8/edit?usp=sharing

Yogidamonk took screenshots of item locations during the Zenith competition, some may be missing here or there but this is the bulk of them.

You can also watch the 100% run to see all the item locations.