Open the App Store
Tap your profile icon
Tap Purchased
Tap My Purchases
Find the deleted app
Tap the download icon
Reinstall the app
Search the App Store if you do not see it in Purchased
Check the app’s name and developer
Restore the app from iCloud backup if needed
Restore from a previous iPhone backup if needed
Check Screen Time restrictions if the app will not appear
Sign in with the correct Apple ID if the app is missing