Many thanks for your kind response,
Based on the screenshot you have provided, you have set the availability in the Microsoft Booking page default policy. This means, the availability you have provided is for all the services in your Booking page. Therefore, to reproduce the issue on my side and provide possible solution, kindly provide us with the availability of the affected service, you can refer to the screenshot below to check the availability of the service.
Once you checked the service, May I please know if the default policy availability and the service availability is the same or different?


I look forward to your response. Kindly note that the above requested information is required for further analysis and troubleshooting of your situation. Your patience and cooperation are much appreciated.
Thank you for your precious time. Have a nice day.
Sincerely,
Libeamlak | Microsoft Community Moderator