Possible improvement to flow for when OB flow is being redesigned.
When booking an appointment online, the first screen which shows availability over the next 7 days, which is good. If booking further into the future, the user picks the day from the calendar and it shows that day. If they then want to browse availability for different days, they need to go back to the calendar and pick a new day.
Maybe previous day, next day navigation would help stop them going back, and let them browse the days more easily.