How can I restore a game on my iPhone 14 Plus?

Hi Popmckay

welcome to the Apple (user-to-user) Community!

Re: "Restore my deleted Apple Solitaire ap: The app was gone and I do not have any idea why but I want it back."

The app icon may have been accidentally removed / deleted from your Home screen.

If so, the app itself may be still in your app Library:

Apple Support's online article may help:

Organize the Home Screen and App Library on your iPhone - Apple Support

Eg: says:

"From your Home Screen, swipe left until you see the App Library.

Your apps are automatically sorted into categories."

or you can:

"Search for an app in the App Library

Go to the App Library. 

Tap the search field, then enter the app that you're looking for. 

Tap the app to open it."

So if you found the app in the App Library ok ... you may want the app icon back on your home screen:

Organize your apps in folders on iPhone - Apple Support may help

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Else: If the app is nowhere to be found: you could try RE-downloading the "Apple Klondike Soltaire game" app:

Delete built-in Apple apps from your iPhone, iPad, or Apple Watch - Apple Support

Eg: Above article says:

"Restore a built-in app that you deleted

On your iPhone, iPad, or Apple Watch, go to the App Store.

Search for the app. Make sure that you use the exact name of the app.

Tap the Redownload button (cloud with down-arrow)

Wait for the app to restore, then open it from your Home Screen".

Or if it was a purchased game / app, you might try following the steps in this article:

Redownload apps and games from Apple - Apple Support

All the best :-)