Hello,
The interview schedule should be arranged to best match the participants’ availability.
For the time being you can only send availability request to candidates.
If the candidate had responded to the interview request availability, the Interview date field will be pre-populated with their selection. You can select a different date if needed.
Add the hiring manager as interviewer. Then for interviewers, you can actually see their calendar availability when creating schedule. Then send the scheduling email to interviewers.

After interviewers receive the email, they can choose to accept/reject or propose new time directly in the email.

Interviewer responses are captured and shown in Attract. For example, when it’s accepted:

Details can be found at: https://docs.microsoft.com/en-us/dynamics365/unified-operations/talent/interview-scheduling-feedback#scheduler-activity
Regards,