Primal doesn't create a relay list event for you. (kind 10002)

You can use jumble.social -> settings -> relay settings to set a few relays

wss://relay.damus.io

wss://relay.primal.net

wss://nos.lol

Then, when you see your profile on njump.me, it should display exactly those same relays. ("seen on")

A product targeted at newbies should do this for you. There is a (good) reason why many people dislike primal. They are good in zero-config startup, but fail in a few other areas miserably.