The US launchers actually have cranes built in. If a pod is sitting there on the ground they can unload the old and load the new. Apparently in Ukraine they pre position pods at planned points so a system can shoot and scoot to the next dropoff site. Swap pods and move to the next planned firing location. So the logistics truck and the launcher are not at the same location to be targeted and you can pre load a days supply without having to run steady and trackable supply runs during the fighting.
Video showing how they reload.
https://www.youtube.com/watch?v=wnUk4n7BElE