@user_3445655 hello,
as far as I know, it's not possible to do that. VLL provides a P2P tunnel over a public network, rather than P2MP.
MPLS L3VPN can provides P2MP services over the public network.
VPLS, which integrates the advantages of both Ethernet and MPLS to provide a comprehensive multipoint communication solution. I think you can choose the VPLS to build the P2MP VPN.
for more about the VPLS, you can find at
https://support.huawei.com/hedex/hdx.do?docid=EDOC1100037168&id=dc_cfg_dsvpn_0001&text=VPLS%252520Configuration&lang=en