Option 1: To have one specific event posted on the site. Paitents can only book an appointment for the Covid Vaccine here for this date.

Option 2: Paitents have their choice of clinic to book in to and click on the clinic that applies to them. At the moment you only have one option set up on calendy hence why only one option appearing here.

Turn on some of the past calendly links and see what it looks like here. Multiple options should appear.

I would put this button on the top right corner of the site for easy access for paitents.