Is it possible? Or Camunda doesn't allow parallel receive task? https://docs.camunda.org/manual/7.9/reference/bpmn20/tasks/receive-task/
That depends on what message you are waiting for. If you wait in each task for a different message there should be no problem and you can model several receive tasks behind a parallel gateway. But if all the tasks are waiting for the same message I would suggest a different modelling -stategy. Just wait for the message with a single receive message task (or event) and after the message is received you can split the flow with a parallel gateway.
I hope that answers your question