Use Mod LRX_Template to extend:
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=3014195090&searchtext=LRX

In the moment for CUP are following Factions available:
"CP_AFRF" - "CUP AFRF Modern MSV",
"CP_BAF_DES" - "CUP BAF Desert",
"CP_BW_W" - "CUP NATO (US,BAF,BW",
"CP_ION_WI" - "CUP ION PMC Winter",
"CP_MAF" - "CUP Mexican Armed Forces",
"CP_SAHRA_D" - "CUP Royal Army Corps",
"CP_TA" - "CUP Takistan",
"CP_USMC_D" - "CUP USMC Desert",
"CP_USMC_W" - "CUP USMC Woodland"

how can i add cup mods to the scenario