wlr-output-power-management finally made it into wlr-protocols: https://github.com/swaywm/wlr-protocols/pull/61 🚀
Thanks @emersion
for finishing up the wlroots side.
This will allow #phosh to notice screen blanks and trigger them. Compositor part side already done: https://source.puri.sm/Librem5/phoc/merge_requests/101