This condition only work for unassgined calendar (no Team Calendars)
Here is a quick video → https://youtu.be/eUJDwaE0WC8
How to display more than one calendar on a page
Using Calendar Links:
Open each calendar link in a new tab by clicking the link icons for each calendar
Copy the calendar ID from one calendar then then go to the other calendar, add a comma after its ID, paste the other calendar's ID after the comma, and hit enter to reload the page
Embedding multiple calendars on a funnel page:
Go to Settings > Appointment Widget and copy the embed code from the first calendar
Go to the funnel page, add a "Custom JS/HTML" element, click "Open Code Editor", and paste the calendar embed code.
In a new tab, go back to Settings > Appointment Widget, change the calendar name dropdown to the second calendar and copy the calendar ID from that calendar
Go back to the funnel page tab that has your Custom JS/HTML element code editor open, add a comma after the calendar ID, paste the second calendar ID, then hit the "Yes, save."