Thank you for reaching out! 1Password 7 for iOS is no longer supported and I recommend that you use 1Password 8 for iOS instead. You can download 1Password 8 from the Apple App Store: Download 1Password 8
If you've previously used 1Password 7 on your device, you might be able to download it from your purchase history:
Open the App Store app.
Tap the sign-in button or your photo at the top of the screen.
Tap Apps.
If you use Family Sharing, tap My Apps or choose a family member's name to see content that they purchased.