After Canonical announced they would be ending 32bit support earlier this year and then adjusting their plans after the backlash, they've now posted what packages they will look to continue supporting.
Canonical's Steve Langasek posted on their Discourse forum a list which they "have been able to determine there is user demand based on the feedback up to this point" and they will "carry forward to 20.04" and that includes other packages not directly in the list that they may depend on.
Additionally, their methodology for picking the packages included ensuring some well-known apps continue working like Unity, Godot, printer drivers and more. The list includes some noteworthy items like SDL 2, Wine, DXVK, Steam, some Mesa packages, a few open source games and so on.
See the full post here, where Langasek did mention to give feedback if you feel essential 32bit packages are missing from their list. It's good to see some clarity surrounding it, hopefully this won't cause any issues now.