Most likely some South American Internet Cafe that never upgraded their hardware. In any case, the user‘s better off installing a 64Bit Linux Distro.

The last windows version to run 32 bit was windows 10 and there is no 32 bit version of windows 11. So for the steam windows client there is no point supporting a end of life OS.

Not everything 32 bit runs on a 64-bit system. A vast majority of things do, but there are a number of unsafe operations that will break your game across architectures, and because games are closed source and the source code is often lost, it's nearly impossible to get some games working on 64 bit architecture. That's why Steam held out so long, some things are just going to break, and their only option is to basically delete them.

64 bit architecture can emulate / run 32 bit processes but the reverse doesnt work.

All of the 16bit and older games will have to be emulated.