Found it, and it is not an indexing problem - it is the safety filter.
GET /v2/store?username=northbell returns 0 Actors.
GET /v2/store?username=northbell&includeUnrunnableActors=true returns all 11.
The docs say that filter excludes Actors from developers who have not passed KYC, or full-permission Actors without a large user base. All 11 of mine are LIMITED_PERMISSIONS, so that leaves KYC.
Where do I complete identity verification? I do not see a payouts or monetization section in Console settings - /settings/payouts and /settings/monetization both redirect to /settings/account.