I think this is what’s playing out:
user fails to accurately assess the loads they will be running in the van
user buys the jackery/yeti/whatever believing it to be a complete solution
user remembers/realizes there are more loads than outputs on the device
and wants to connect to a distribution panel
IMO, wanting to connect to a distribution point suggests (but does not prove) the user needed a normal house power system rather than a solar generator.