The spawn point prefabs do not use supplies. Their name implies they do. I assume the Conflict HQ Prefabs have to toggle it with init code, but I can't find that specific bit of init code.
I am making this ticket to bring awareness. I am content with my own versions of the spawnpoints.
Supply setting: SpawnPoint Entity > SCR_ResourceComponent > Unsorted Category > Disabled Resource Types Array > 0: SUPPLIES

E_SpawnPoint_NoFaction_Supplies.et
E_SpawnPoint_FIA_Supplies.et
E_SpawnPoint_US_Supplies.et
E_SpawnPoint_USSR_Supplies.et