Hit a bit of a snag with armv7l builds because I have ran out of Pis... Don't want to decomission the old armv7 build system just yet.
Emulation is out for now as there's no kernel for bookworm. However, it seems I can emulate Ubuntu arm64. D'oh, should have done that in the first place.
So looks like I will need to move some things around (move Ubuntu arm64 build into emulation to free up a Pi) before the next release. Until then I will add some of the missing players.