It will be labeled NAME or CUSTOMER NAME...ultimately its just a list of entities for that sub

There is a drill-down NAME in the journal entry line , but it seemed it’s not aligned with the the actual vendor name though it’s the same list. I try to run a vendor transaction report including journal entry type, these JEs never show up in the report.

Not sure what to tell you...which report are you trying to make it appear on? Probably another filter in place