How can I delete apps that are in iCloud but not visible?

Hello, Perro.

Thank you for using Apple Support Communities.

Currently, there isn't a any way to remove apps from your iCloud list or purchased lists. You can hide them using these steps here: Hide purchases from the App Store

"What happens when you hide an app?

When you hide an app, it won't appear in your list of purchases in the App Store. If you use Family Sharing, the app also won't appear in family members' purchases and won't be available for family members to redownload. But the app will still appear in your purchase history.

Hiding an app won't remove it from your device, a family member's device, or other devices that are signed in with your Apple ID. If you want to remove an app from the Home Screen, customize the Home Screen on your iPhone."

Best regards.