Currently the services can be filtered with APICAST_SERVICES_LIST as described in the documentation [1].
The problem with this solution is that when you have a high number of services, we will have to list them all.
This is not very flexible.
The objectif of this RFE is to providing a more flexible way to define the services that will be involved either by providing a wildcard or a regular expression that would match the services to target while staring the gateway.