To block your availability when you're on vacation or exceptionally unavailable for a certain period, you can set a specific date range.
To do this, click on the "Availability" tab for each of your appointment types.
Then, click on "Add a date interval".
You can define a specific period during which you will be unavailable.
Don't forget to check the box "Remain available outside these dates" so that your other time slots remain bookable through your appointment link.
Don't forget to save !