Since j5nlte, j5ltechn and j5lte are currently on Oreo, it’s probably not a priority to upgrade them to Pie. But I still ask for the upgrade to show at least one person is interested.
I don’t think this phone has one day been supported by LineageOS. So I redirect to unofficial builds :
I’ve never tested it on my j5nlte since I don’t know if the anti-rollback thing could be an issue for my phone.