Glow wallet from breez seems like a great wallet to onboard nostr users who are not using primal. It's non-custodial, provides a nostr enabled (supports zaps) lightning address, passkey login, and can even make USDT and USDC payments even though the wallet only holds bitcoin. Nostr client devs could probably even just give an AI agent the Breez SDK docs and the Glow repo and have it build a wallet with the same functionality right into their app.

https://glow-app.co/