The wbg package provides a Wayland wallpaper setter.
Pixman, Wayland, and Wayland-Protocols
libpng, libjpeg-turbo, libwebp, libjxl, and tllist-1.1.0 (if not built, it will be downloaded)
Install wbg by running the following commands:
mkdir build && cd build && meson setup --prefix=/usr --buildtype=release .. && ninja
Now, as the root user:
ninja install
--buildtype=release:
Specify a buildtype suitable for stable releases of the package, as
the default may produce unoptimized binaries.