Camunda Cloud offers Operate to monitor your process instances. An entry point can be found in the Cluster details.
By selecting the deployed workflow you will see a list of instances that can be filtered:
Because the started worker returns
the workflow ends in the upper end event.
Changing the worker to
and creating a new instance leads to a second instance in Operate, which you'll see ending in the second end event:
As a next step you can now connect both workers in parallel and create more workflow instances:
In Operate you will see instances ending in both end events depending on which worker picked up the job.