Update: after 3h of constant debugging and trying to fix the master pgp keys (one key was always expired and Blahaj couldnt recreate them) she gave up an is now installing Opensuse instead.
Second Update: after realising, that either I Am stupid, or the OpenSuse Tumbleweed install screen is complete bullshit I found something called ArtiX, that ended up working completely fine and actually worked. That was one hell of a trip.
Install arch-32 from within arch into whatever storage you're trying to install it onto.
Basically:
Have an arch system ready
Manually install the arch-install-scripts from the arch 32 bit projects repository in a sandbox environment (to avoid putting yourself into a broken, unsupported state)
Mount the storage to which you're attempting to install into {sandbox}\mnt\
Follow the install guide as normal, using the already updated pgp keys from your already working archlinux installation.
Transplant the storage back into the 32 bit system and pray
How the hell do I do this?
Install arch-32 from within arch into whatever storage you're trying to install it onto.
Basically:
That may look like something I could try giving a shot, but I will not get to try it out in the next 4 weeks.
Good luck friendo! If you have trouble you're welcome to shoot me a DM and I'm happy to offer assistance.