Of all the apps I subscribe to there isn’t anything like Wallaroo.
It is an app for iPhone, iPad and macOS made by The Icon Factory that has loads of great wallpapers. Some of them are free, some require a subscription. There are a few different levels of them, one through the App Store, plus a few different levels on Patreon.
I love this app. It doesn’t have an useful or productive function. But it is so much fun.
One thing to note though, is that I had to go in and modify the Shortcut they install to set the wallpapers to let me pick what Wallpaper set they’re adding wallpapers to. Seems like it might be defaulting to the currently active one at install time.
What I love about it, outside of being really fun, is that all the wallpapers work well as wallpapers. Some better for home screens others work better for lock screens. But all of them are great for at least one of them.