Hello,
There is no such an API to detect click event on search icon of SearchBar, even if on native Android or iOS platfroms.
For instance on Android, access to the searchbar icon has been restricted, you need to find its id in Android to find it.
If you want to implement this functionality, then using custom controls would be a better approach.
You could refer to Create a custom control using handlers to get more details.
Best Regards,
Alec Liu.
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