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Query 1: How to add multiple event indicator on same day
We can add multiple event indicator by providing multiple inline event with different time in same date. we have also prepared the sample for you. Please find the sample from the below link.
Query 2: Circular Inline event indicator for SfCalendar
In our current implementation we do not have support for this and we have considered this requirement as a feature request. It will be available any of our upcoming release. Please check our website periodically to know the status of the feature that are implemented.