Capabilities registered by the messaging-server's broadcast-group resources are using the pattern:
org.wildfly.messaging.activemq.broadcast-group.channel-factory.<broadcast-group name>

This prevents having 2 broadcast-groups belonging to different ActiveMQ servers using the same name configured in the same profile.

Instead, the ActiveMQ server name should be part of the capability name, e.g.

org.wildfly.messaging.activemq.broadcast-group.channel-factory.<server name>.<broadcast-group name>