Hello krissyjane and welcome to Apple Support Communities.
I see you are having difficulty locating a recently downloaded app without using Siri App Suggestions.
Move and organize apps on iPhone - Apple Support
If you can't find it on another screen or in a folder, you'll find instructions in the article linked above to Reset Home Screen layout. This would remove any folders that might contain multiple apps and organize all apps alphabetically with the ones you've installed yourself coming after those that are installed as part of iOS.
Cheers.