Hi @Zoe515 , Welcome to the Community Center 🌻
Does it still show the same prompt of "not yet available for guests" or has it changed since you posted?
Have you tried out Joan's suggestion to solve it? We look forward to hear if you had any updates for us 🤗
Although it seems you've already explored all options for instant book, I'm sharing a helpful link if you wanted to read more information about instant book and how it works : articles related to instant book. Hope it helps!