Following up on my previous bug, powerdevil-data depends on power-profiles-daemon, so I still cannot install tlp on neon-desktop. I would guess this is also optional, as I already have the daemon disabled and all the other powerdevil things work as expected.
made tlp an option instead of power-profiles-daemon - https://invent.kde.org/neon/kde/powerdevil/-/commit/0040dddd495fd0b93e5a7f1098637789a661c7ef