Is there a method that I can create a mass SMS or mass Email for the appointments for the current or the next week or next two weeks? Or maybe a means to identify & collect the needed information to create such?
we don’t have a bulk cancellation feature.
I would recommend exporting all your bookings so you can have a list of all of the emails of your bookers. You can then email them together letting them know the bookings have been cancelled. https://support.youcanbook.me/article/75-view-and-export-your-booking-activity
To bulk cancel you’d either need to cancel via the Bookings page or delete all the booked events from your linked calendar.