The Devices page is new and has been out a few days ago, so some elements might be wrong.
For instance, I have a j5nlte (SM-J500FN) and it’s single SIM, not dual as stated.
By the way, the official /e/ support for this phone will be dropped in a few months so you could directly install my unofficial build on Pie (not on Oreo as the official one). I plan to build an update next week.