Canonical’s Ubuntu engineers worked with community members to determine their 32-bit support adjustments for the Ubuntu 20.04 LTS version. After discarding the original proposal (i.e., completely clearing the 32-bit package), Ubuntu 19.10 comes with a streamlined set of 32-bit packages (32-bit x86) for x86_64 users.
Those 32-bit packages on Ubuntu 19.10 are selected based on popularity and may still be commonly used on modern Intel/AMD systems. For the Ubuntu 20.04 LTS, some minor adjustments are under way.
This post from the Ubuntu community lists some of the new additions and removals planned for Ubuntu 20.04 LTS. As with libssl 1.0, wine-stable-i386, gcc-8-base, and other packages are removed due to obsolescence or other factors. Other 32-bit packages have been added, including Freeglut, libv4l, VDPAU driver, VA-API driver, and a variety of other libraries.
Ubuntu developer Steve Langasek outlines about 1,700 source packages that will trigger the build of Ubuntu Focal (20.04) on Launchpad’s i386. What is about to be done is some other build/infrastructure changes, as well as improvements to its autopackage test infrastructure.
In general, Ubuntu 20.04 LTS supports 32-bit packages very much the same way you use Steam in Ubuntu 19.10, and you can still access other packages that are not yet fully x86_64.