You'll need the following dependencies:
libadwaita-1-dev >= 1.4.0
libedataserver-1.2 >=3.40
libglib2.0-dev
libgranite-7-dev >= 7.1.0
libgtk-4-dev
libswitchboard-3-dev
meson
valac
Run meson to configure the build environment and then ninja to build
meson build --prefix=/usr
cd build
ninja
To install, use ninja install, then execute with io.elementary.settings
ninja install
io.elementary.settings