They do mention that they support 3 different profiles - openrc, gnome/systemd and plasma/systemd. Nothing mentioned about glibc/musl split. But they seem to be

They do mention that they support 3 different profiles - openrc, gnome/systemd and plasma/systemd. Nothing mentioned about glibc/musl split. But they seem to be aiming only for a reasonable coverage. So I'd speculate that only glibc is targeted.