I spotted a post by Canonical about support for 32-bit:-
"Thanks to the huge amount of feedback this weekend from gamers, Ubuntu Studio, and the WINE community, we will change our plan and build selected 32-bit i386 packages for Ubuntu 19.10 and 20.04 LTS."
Short story: I have been and will continue to test Ubuntu/Lubuntu on actual 32-bit hardware.
I have been running a Computer Refurbishment Project for the benefits of members of Contact Morpeth, a mental health charity. The number of 32-bit systems still in use are declining but there are a few systems soldiering on that I test Ubuntu/Lubuntu on.
Also: a side issue. The Ubuntu shop seems to have closed down. Before I pass on equipment, I've been putting an Ubuntu Linux sticker on it. Will stickers still be available?