@TheForge129
I'm glad I am not the only one. I've spent a few hours trying to figure this out myself.
I have tried installing a few MLO's, edited the dlclist.xml file and placed the dlc folder into the dlcpacks folder. Yet lately they dont work.
I've used the Foodshops mod and it works no problem.
I think it might have something to do with the most recent update possibly? Im not sure.

@skawzy
I'm installing this one. Its pretty simple install yet I'm not getting any results when installed properly.
https://www.gta5-mods.com/maps/mlo-lost-mc-bar-paleto-bay-add-on-sp-fivem-altv#description_tab The version of this mod I am trying to install is the SP version.
I'm running on a legit copy of gta 5 via the epic games store.