Some 32-bit computers are not even “old”, and recently as windows 8 they were still released.

Only a couple mainstream distros support 32-bit like Debian, Opensuse, and windows 11 dropped 32-bit support.

One project is trying though

“Still holding onto your 486? No worries, our maintainers love your old computers, and intend to have them run AOSC OS. AOSC OS/Retro is a purpose-built distribution optimised for devices with limited RAM, processing power, and storage space.”

Picture Source: https://old.reddit.com/r/linux/comments/sengdn/ibm_palmtop_pc110_with_modern_linux_aosc_osretro/