Was scraping through the uniplus source and found an icon here:
https://github.com/arcanebyte/uniplus/blob/5284d09674eacc325da78bbbf2a64e7b25b85794/v1.5/stand/console.c#L8Can't say I understand what it's supposed to be a logo of, it but it seems to pass it to the Lisa Boot ROM, which means it should be rendered like it shows in the file below.
(About 20 years ago I wrote a small program to decode the Lisa Boot ROM icons. The Boot ROM uses an early packbits algo, I think.)
Here it is for shits and giggles, enjoy (or not), not sure what the UniPlus one is supposed to represent, whether it's an error in decoding or not.
I've also posted the output text so you don't have to compile it yourself if you don't want to.
(Rename the .c.txt to .c)