I have a hypotheses that high volatility in the mornings ends up suppressing after 2pm-3pm. I think it's just animal spirits and that won't change.
Except on FOMC days when it is the opposite.
I think a mechanical strategy would work on most but then you would need to account for exceptions.
I think 2-3pm might be late to get an acceptable range and risk/reward for this type of 0dte neutral play. Lunchtime maybe.