Where is igmp-proxy?

RouterOS Forwarding Protocols
1

I need to setup IPTV multicast forwarding between two interfaces. I see examples for /routing igmp-proxy.
My router is missing this command…
How to get that command enabled?

MikroTik RouterOS 6.45.8 (c) 1999-2020
#   NAME                                            VERSION         
 0   routeros-mipsbe                                 6.45.8
 1   system                                          6.45.8
 2   ipv6                                            6.45.8
 3   wireless                                        6.45.8
 4   hotspot                                         6.45.8
 5   mpls                                            6.45.8
 6   routing                                         6.45.8
 7   ppp                                             6.45.8
 8   dhcp                                            6.45.8
 9   security                                        6.45.8
10   advanced-tools                                  6.45.8
                  version: 6.45.8 (long-term)
               build-time: Jan/23/2020 07:19:45
         factory-software: 6.40
              free-memory: 41.8MiB
             total-memory: 64.0MiB
                      cpu: MIPS 24Kc V7.4
                cpu-count: 1
            cpu-frequency: 650MHz
                 cpu-load: 5%
           free-hdd-space: 3176.0KiB
          total-hdd-space: 16.0MiB
  write-sect-since-reboot: 1208
         write-sect-total: 3726
               bad-blocks: 0%
        architecture-name: mipsbe
               board-name: hEX PoE lite
                 platform: MikroTik
2

install multicast package.