⛱️How to have our appointments populate into our google calendar?

This is possible (requires to be on the Elite plan on Cowlendar) as you can sync google calendar. Just click on Apps > Cowlendar > Team > Connect Google

You can also enable 2-way sync if you want events to sync both ways.

This means bookings from cowlendar go to google calendar and any event/task on google calendar blocks timeslot on cowlendar if they have a limit