Why No Reporter Information Is Displayed in the display igmp group Command Output?

If the display igmp group does not display any reporter information, the specified group has no group members.

Normally, after users join a group dynamically by sending IGMP Report messages, the display igmp group command can display IGMP group information. The following is an example:
<HUAWEI> display igmp group
Interface group report information of VPN instance: public net
Vlanif100(10.1.6.2):
Total 1 IGMP Group reported
Group Address Last Reporter Uptime Expires
225.1.1.2 10.1.6.10 00:02:04 00:01:17
In the command output, Group Address indicates the IP address of the group that users have joined, and Last Reporter indicates the last host that has sent an IGMP Report message for the group.