Mine was blank. I tapped Refresh and some carrier-generated numbers populated, but it didn’t have any negative effect on my connectivity.
I suspect soonish: Announcing the start of /e/ R beta testing
Nothing but Linux in my house! (And /e/ and some somewhat de-trackerized other Androids)
P.S. Sometimes, carriers have alternate APN settings that can be tried. You might talk to yours, if you haven’t already since the new issue came up.