Yes, this is exactly how it works. Booking.com's iCal export does not include guest names, contact info, reservation IDs, or anything personal. It's not a mistake and there's nothing you can change. The link is public, so exposing that kind of data would violate GDPR and other privacy rules.

The iCal feed is only meant to block off booked dates. You get check-in and check-out, that's it. No guest details, no special requests, no extras. That's the whole point of it.

If you need real booking data like guest names or contact info, you have to use the Booking.com Connectivity API. That means applying as a partner, getting approved, and then using the secure API to pull reservation data.