Is it possible to add custom availability on Microsoft Booking via Graph Api

Question

I'm hosting multi Day events trough Microsoft Bookings. The events are general not available unless i set "Availability during these dates:" for specific date ranges. I played around with the Graph REST API but i couldn't find a way to set these custom availability times trough the API. Link to the API. Does anyone know if there is a way to set these dates trough the API ? Screenshot of Bookings