Greetings from Syncfusion support.
We have checked your reported issue from our end. Currently, we have not provided support for dynamically open Tooltip component. We have already considered this as a feature from our end. This feature will be included in our March first weekly release which is expected to be released at the first week of March. Please be patience, until then.
Track the below link for feature status.
Please let us know, if you need any further assistance on this.
Shameer Ali Baig S.