To allow anyone to book via Microsoft Bookings, you need to disable the "Require a Microsoft 365 account from my organization to book" option in the Booking page access control settings. This will allow anyone to view and book your services without requiring a Microsoft account. If you are unable to find this option, it may be because your IT administrator has not granted you the necessary permissions. You can contact your IT administrator to request access or assistance with this issue.
References: