The final official release with broad 32-bit desktop support was Ubuntu 18.04 LTS (Bionic Beaver) . While this version is now past its standard five-year support window, it remains a common target for users seeking a "classic" Ubuntu experience on old hardware.
Although Ubuntu has dropped support for 32-bit architectures, you can still find and download the 32-bit ISO files from various online sources, such as: linux ubuntu 32 bit iso
A 32-bit ISO file is a type of image file that contains the installation files for the Ubuntu operating system, optimized for 32-bit processors. This file can be used to create a bootable USB drive or CD/DVD, which can then be used to install Ubuntu on a computer. The final official release with broad 32-bit desktop
Run this command in a terminal: