Do you know any other distro that’s not LFS or Gentoo that still supports x86? I said a lot, not everything. Most distros don’t support anything below 64-bits.
A fork supported PPC up until a while ago. That project halted though. There was a new spin on it, can’t remember the distro’s name though.
xbps-src can cross compile for MIPS. There are no packages in the repo for MIPS though.