Hello dlilligaf1976! Thank you for participating in the Apple Support Communities.
We understand that you had an app called moqo view that is no longer available in the App Store, and you'd like to be able to install it again. We'd like to look into this with you to see how we can help.
Developers can make the decision to either add or pull their apps to or from the App Store, or it's possible that apps can be removed for various reasons by Apple. We'd recommend reaching out to the developer to see if they have plans to have their app added to the App Store again, or you can search the App Store for an app with similar functions as that one.
How to contact an app developer
Make it a great day!