Namespace for Event Mesh instance on a trial account

Hi,

I've created an instance for Event Mesh on my SAP BTP trial account using the following service descriptor:

 {
	"emname": "MyEventMesh",
	"options": {
		"management": true,
		"messagingrest": true
	}
}

A namespace can not be entered when creating an instance in trial. Next, I tried to configure our demo S/4 HANA environment to send events to a queue I created on the event mesh. My problem;

When trying to create a channel via service key we get the error "Namespace for channel not provided in service key".

In manual configuration topic space is a mandatory field (see attachment).

Apparently the "Topic Space" should be namespace of the event mesh service, but I didn't get to set one with the service descriptor, since only the mini version of the descriptor works with the trial.

Is there a default namespace for trial instances of Event Mesh, or can it be viewed somewhere?

Or are we just unable to use the trial event mesh for this scenario?