Pre-compiled 32-bit ARM binaries are still provided for devices like older Raspberry Pi models. macOS: 32-bit support was dropped in version 0.9.0. How to Download Bitcoin Core for 32-bit Systems
For 32-bit ARM Linux users, look for the ARM Linux 32 bit link. bitcoin core 32 bit download
If you must use a 32-bit Windows machine, you would need to download a legacy version (v0.17.x or older) from the Bitcoin Core File Archive. Warning: Legacy versions lack critical security and protocol updates. Critical System Requirements for 32-bit Nodes Pre-compiled 32-bit ARM binaries are still provided for