@MrT10001 I can't use a VM...darn. Is there another way to unbrick it?

I installed LineageOS a while ago on the Nord N10 5G I have, but now I want to try to install Ubuntu Touch. The installer says I have to have the original OxygenOS though, and I can't figure out how to revert it since all of my devices run Linux, and AFAIK the OnePlus recovery tool only runs on Windows.

How do I proceed? Am I stuck?