This sounds a lot like the case “finding an animal in a vehicle/storage container/etc (e.g. driving to California from Pennsylvania and finding a living spotted lanternfly in your car)” from this discussion:
https://forum.inaturalist.org/t/wild-vs-captive-cultivated-gray-areas/39882
There were competing opinions, but wild seemed to be the more common conclusion on that thread. The reasons were twofold:
-the organism was in the place it was in due to inadvertent human action, not deliberate, and iNat’s definition of wild does not require the organism to “have had some effect on local ecosystems”, only to be present at that geographic location without a human deliberately moving it
-the fact that the organism made it that far before being destroyed is itself noteworthy- if we’re tracking zebra mussels, and the mussels made it into the state and all the way to the edge of the lake before being noticed and destroyed, that’s still relevant data.
I believe this case, as well as the Bidens seed or container ship snake examples, are precisely what is meant by “hitchhikers” in this definition.