Is there a report to pull all detail (all lines) from JEs? Running a list view shows only one line of the JE. I don't see any report/search that seems to be what I need.

all lines are "main line" if you look at the saved search for JE's and include doc number you'll see both the debits and credits listed.

So a search is my option here, yes? easy to set up, I wasn't sure if there was a native financial report that I couldn't find.

a transaction search is the right answer.

yep