I’m not sure this is a long-term solution, because:
We are currently concentrating on Gnome and XFCE edition first, to get Pamac ready. Also we don’t support gtk3-nocsd or gtk3-classic, as libhandy and libadwaita only works with CSD enabled. Our focus on theme support is on Adwaita and Matcha. Supporting Plasma with this v10.1.x series is currently secondary, as we first have to finalize the Gnome 40.1 ports. link