Post-process settings need to be able to be seen in live edit directly because the lighting is not the same as UEFN (due to an issue mentioned here Major - Lighting in UEFN/Creative is not the same and here Major - TOD settings cannot be shown in UEFN) so tweaking a setting and not seeing it until after 2 mins is not the play when there are hundreds of tweaks needed.
Thank you for your feedback. While cannot guarantee a response, I can confirm that this has been forwarded to the appropriate team.