@SuperDicq I use the default wallpapers on KDE and choose from one of the offerings on XFCE.

Honesly many of the Windows wallpapers since XP (especially Bliss) were great, and I would use them on my computer too (thanks to the Windows Wallpaper Wiki), but they might have licensing restrictions given they’re from a large corporation. On the other hand, Linux’s wallpapers are free.