No, Special Apps Can't Remove Stickers From Facebook Photos of Kids ... which means it is not possible to extract, edit, or remove a background layer (e.g., an original photograph) ...

Desktop background stickers aren't avaialble for testing at this time. Presumably, Albacore was able to unlock the feature after finding it in an Insider build of Windows 11.

Remove the background image in your photos using Paint 3D in Windows & make it transparent or white. You can create a sticker, 3D model, and insert the image into another image.

Google Allo gets expected background themes, emoji suggestions, Fantastic Beasts stickers. Stephen Hall ... which will give you context-relevant suggestions for emojis and stickers.