How to recover a deleted app on iPhone?

From what I know, you cannot recover a deleted app’s data once you delete it.

you could ry signing into the app with your iCloud account if you re-download it through the App Store and hoping that their servers saved your data.

if you offloaded the app, just click the app icon on your Home Screen and it should begin downloading again and bringing your data back.

good luck

Just re-download it from the App Store.

Sorry, I misunderstood the question, I thought you were trying to recover lost data.