This is what I was figuring - which is prob also why Plebstr won’t let me zap on iOS bc they aren’t using Strike.
Discussion
Plebstr doesn't have a built in wallet like Primal does. The only two Nostr clients with built in wallets are Primal and Current.
As for Plegbstr. It's fairly old and outdated, not having any updates in a very long time. They're moving to a new unified decentralized app, combing Nostr and ActivityPub.