Nice to read that more and more people are using btrfs on LUKS. I went for the debootstrap route from within a booted debian live iso to omit the debian installer entirely.

Seems like it’s even a little easier than achieving the same with ZFS: https://openzfs.github.io/openzfs-docs/Getting Started/Debian/Debian Bookworm Root on ZFS.html

If I’m not mistaken I think spiral linux has this as an option. Its basically just a customized debian install and doesn’t use custom repos or anything