You can set your delivery schedule's cut-off time and lead days.
How to set cut-off times and lead days
Go to Admin > Settings > Delivery > Select the delivery or pick-up option for which you wish to establish a cut-off time. If you haven't have one, click
Create
Navigate to "Schedule" at the bottom and set it to either "Date", "Date and time", or "Date and timeslots."
Then go further below and toggle cut-off time (e.g., fixed time of the day at 6 pm + minimum 1 lead day)
Please ensure you verify your cutoff time setting by reading the provided simulation.