Greetings from Syncfusion.
Query 1: When selecting the items in Token mode, selected item count is not updated correctly.
We have created the SfAutoComplete sample in which we have updated the selected item count when the selection gets changed inside SelectionChanged event and the selected item counts updated correctly in Token mode. We have prepared the sample for your reference. Please download it from the below link.
Query 2: After clearing the selected item and adding the selected item dynamically UI does not reflected.
We have tried your requirement by clearing the existing item in the autocomplete and we have tried adding the selected item collection dynamically. The selected item updated in UI in android and in iOS we are facing the exception. We have provided the sample below. Please download it from the below link.
Please try our sample and let us know you are facing the same issue in iOS. If not please modify the given sample and provide us with more details on which scenario you could reproduce the issue and it will help us work further with your requirement