Peter Thompson of the Spirt of Oregon Foundation has created an great resource of the complete Olympic TF schedule with event times, competitors, and link to results on this linked excel sheet.
TOKYO Olympic T&F schedule – WHOLE USA time zones with RESULTS HYPERLINKS
Also handy is the NBC viewing guide: https://www.nbcolympics.com/news/how-watch-track-and-field-tokyo-olympics
Go team USA!