In the attached picture, there is a calendar sitemap component added in the app, however user is not able to see this in their respective login. This doesn't happen in the legacy UI for the same user role. Please let me know what is missing here. Thank you.
The legacy calendar is part of the Service Scheduling features that have been deprecated:
https://docs.microsoft.com/en-us/dynamics365/get-started/whats-new/customer-engagement/important-changes-coming#service-scheduling-in-dynamics-365-for-customer-service-is-deprecated
So the behavior you are seeing is expected.
Now, in order to access similar features as the legacy calendar, here are some useful resources:
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