After a lot of work, I have Ubuntu running on my 2015 mpb. This reddit was a great source of knowledge, so thank you!

Took time and testing to get the disk, wifi, bluetooth, sound, graphics and suspend to work correctly, including a recompiled kernel and a module.

I created a repo that can be copied to an USB, with scripts to fix the common issues on MBP 11.5.
I just wiped the partition and ran it all a second time. Worked fine.

https://github.com/CarlRibbegaardh/macbookpro11-5-ubuntu-26.10

It's only virtual but works perfectly 👍