Unfortunately not, generally speaking an app can't install other apps on iOS
Is the nostr:npub10r8xl2njyepcw2zwv3a6dyufj4e4ajx86hz6v4ehu4gnpupxxp7stjt2p8 available on iOS or TestFlight?
Unfortunately not, generally speaking an app can't install other apps on iOS
All the more reason to get a secondary device.