What about To add ''non-enemy'' NPCs like hostage rescue missions, NPC to capture and interrogate, allied partisan contact to meet at a meeting place to get information, some ready or not mission vibes where we have to scoot, identify and be careful before pressing the trigger.
I know it can be delicate with multi-player As we can be several to have the quest at the same time so maybe make sure that they are squad quests Far from the POIs which, once accepted once on the field, disappear for a while, first come first serve with ofc the possibility to fail the quest.