Hi, Md. Nayem Hasan Munna

Firstly, I would like to sincerely apologize for the delayed response as we have been experiencing an unusually high number of tickets. I am sorry that it has taken longer than usual to respond to your concern and your patience is highly appreciated.

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The available time slots are directly linked to the employee work hours.

Also, check if you need buffer time for the service - for example, if you set 30 minutes as "buffer before", this means the service starts 30 minutes after the work hours begin;

Let me know  a bit more details exactly what the duration of the service should be - do you need buffer times?

Here is an example for 1 hour service with no buffer times :

As you see, i just set 1 hour duration,  and the employee work hours from 8 > 9 AM, and then the service will be offered at this time.

Let me know if you have any questions. Thank you