Updating Resource to Accepted when Updating Event

Question

I am adding a resource to events using Microsoft's Graph API and I have been able to successfully add the event to the resource's calendar. The resource normally automatically accepts events, but is not when added via the Graph API. And I have tried setting the attendee's status as accepted when I update the event attendees to include the resource. But the event remains as tentative when viewing in Outlook. Is it possible to mark a resource as accepted when adding it to the list of attendees? If not, what other endpoint would I need to call to make that happen?

Current relevant parts of the code:

Endpoint:

PATCH https://graph.microsoft.com/v1.0/users/<userId>/events/<eventId>

Request body:

{"attendees":[{"type":"resource", "emailAddress":{"address":"<ResourceEmail>"}, "status":{"response":"accepted"}},<other attendees>]}

The outcome remains the same whether I include the "status" part or not - i.e. it is added to the calendar as tentative. Thanks!