Open iFrame from Button block for Google Calendar Appointment Scheduling

I'd like a button block to open an iFrame for Google Calendar appointment scheduling. The page is behind a paywall so I cannot share. Can you give me the basic code to do this?

<iframe src="https://calendar.google.com/calendar/appointments/schedules/AcZssZ1hbCBmwfvG3HgDLdsi3MIYySgUEs9i_DRo7soqbnNn7r2eqzszvgAu6r9PwgMhcHQH3WBbx5Gf?gv=true" style="border: 0" width="100%" height="600" frameborder="0"></iframe>

I created a quick example, is this what you want?

https://tuanphan.squarespace.com/gg-calendar-popup-3?noredirect

pass: abc

Click/Hover on button >> Open Google Calendar in a Lightbox