Length of Appointment

I am pushing heavily within my organization to make the switch from other booking platforms (Bookify, HubSpot, etc..) to a single centralized platform within the Office365 environment we already heavily use.

One of the challenges though is that most of those platforms allow the person scheduling the appointment to choose the length of the appointment (when enabled) but this doesnt seem to be an option in Bookings without building out multiple service offerings

Help?