--- Comment #7 from Neil Rickert firstname.lastname@example.org ---
Isn't this a duplicate of https://bugzilla.opensuse.org/show_bug.cgi?id=1172292?
No, it isn't. Bug 1172292 is about the general problem of support for these systems. However, if you can manage to get it booted, then it does work.
This bug is about a more specific problem, that the 15.3 kernel won't load, even if you get around the other difficulties.
I actually have Leap 15.3 working in a VM with 32-bit EFI. However, I have to use either the Tumbleweed kernel or the Leap 15.2 kernel. I cannot get the 15.3 kernel to load.