Set an automated next action with date & time

I have a flow set up for new enquiries that sets next msg and sends SMS chasers via Twilio plug in on new enquiries that I haven’t spoken to. I use a combination os status update that then sets next msg date. I want to be able to set a time for the messages to be sent so can send more than 1 per day but the automated option only allows + day number. Does anyoen know if there is a way to get this to do hours? and ideally exclus out of hours times?