There are some nuances to "i386" support, e.g. #debian still ostensibly has an "i386" port, but the current baseline for Debian bullseye (11.0) requires an i686 compatible processor.
Debian jessie (8.0) supported i586 (released ~7 years ago?). Over time the baseline gradually crept up, sometimes unintentionally.
I don't recall off the top of my head the last Debian release that supported i486 and i386 compatible processors, it was a while ago!
@ademalsasa The kernel proper has removed i386 support back in 2012, so 32-bit x86 support is limited to i486-class and later CPUs
For people who care about, support, or build Free, Libre, and Open Source Software (FLOSS).