[zozbot234]

32-bit userspace packages are still supported, though with increased hardware requirements compared to Bookworm. You may find that you're able to run a more-or-less complete 32-bit Trixie userspace, while staying on Bookworm wrt. the kernel and perhaps a few critical packages.

If 32-bit support gets dropped altogether (which might happen for 'forky' or 'duke') it can probably move to the unofficial Debian Ports infrastructure, provided that people are willing to keep it up-to-date.