"When making a reservation for my guest, each booking will be for a single room. Therefore, it's not necessary for the calendar dates to be closed off. Is there a possibility for each room to have its own reservation system?"
It's been a while since you posted and I'm wondering whether you managed to get a resolution to your question or if @Mike-And-Jane0's answer supported you? If so, it's always a lovely gesture to mark it as the best answer. It's like a big virtual hug to the member who supported you but also to support other Hosts who may have similar questions in the future. 😊