labwc was chosen because it was the only Wayland compositor reasonably suitable for use with LXQt in a VM. See:
Probably not until the release of Debian Forky at the earliest, possibly never if Debian doesn’t package it. Upstream doesn’t sign their releases or Git commits, and we try to not package architecture-specific code for the sake of supporting multiple processors without complicated build infrastructure. It’s possible we will introduce graphical tools of our own for configuring labwc in the future, but this isn’t planned at the moment.