You don’t have the Use As Wallpaper option when you tap the three-dot menu top right?
I’m not familiar with Samsungs so I’m not sure how they do it, but there must surely be something like that.
Welcome aboard. :)
You originally posted in another member’s introductory thread, but every new member has the right to their own thread, so I’ve created one for you.
Enjoy the forums. :)