Hi there!
Have you read through this post? It may lead you in the right direction.
As a last resort, you can always use a call to the REST endpoint: /engine-rest/task
Will get you a list of tasks, but if you call /engine-rest/task/{id}
with the task ID, you will get an object back:
{
"id": "274b3f85-a149-11ec-9f25-42010a8e0002",
"name": "My Task",
"assignee": null,
"created": "2022-03-11T14:40:10.557+0000",
"due": null,
"followUp": null,
"delegationState": null,
"description": null,
"executionId": "274b1872-a149-11ec-9f25-42010a8e0002",
"owner": null,
"parentTaskId": null,
"priority": 50,
"processDefinitionId": "MyFormForm:2:40c847df-a147-11ec-9f25-42010a8e0002",
"processInstanceId": "274b1872-a149-11ec-9f25-42010a8e0002",
"taskDefinitionKey": "Activity_0miveyp",
"caseExecutionId": null,
"caseInstanceId": null,
"caseDefinitionId": null,
"suspended": false,
"formKey": null,
"tenantId": null
}
As you can see in that object there is an assignee
field.