Hiya @Linda108 and @Tory-and-Allen0 ,
Sorry for the delay coming back to this. The product team have also had read through of your posts and provided the following additional information:
If hosts want to require a first message, they need to turn this pre-booking message required
to ON (pictured)
Having instant booking on alone will not work. I also wanted to mention that the introductory message is not required.
Once the feature has rolled out to 100% of users, we will work on updating the content across the site.
Thanks,
Stephanie