Sounds like you were running an import and distribution business. Not the same thing as drop shipping :) as the drop shipping people will joyfully tell you, “you’re not supposed to touch the product”
the inspection part is a big deal. drop shippers don't add any value, but inspecting the goods (and rejecting those that don't meet spec) actually adds value.
I started a business like this, but it wasn't passive. I shipped everything to my office before inspecting and shipping product out.
It lasted almost 10 years with 1 million annual revenue.
It was not passive.