Google Calendar is not in sync with bookings

I have google calendar. I created a new calendar From Url, and pasted the export url. I can see the current bookings. But if I get a new booking it is not updated with the bookings that happen after I have set up the calendar. Is it supposed to update anytime there is a new booking?

Unfortunately Google Calendar is not reliable for this purpose, they have no guaranteed syncing delay - last time I checked the dates were blocked within 6 hours. For example, other platforms like Airbnb sync the calendar every 5 minutes.