I admit, I was partially wrong. The CoC violations occured outside freedesktop and he received an email from a freedesktop member stating that their CoC does extend outside their immediate project, to some extent.

This isn’t that unreasonable in my opinion, considering that his behavior “reflects on communities like [FreeDesktop] when [they] interact with and accept contributions from hyprland.”

Of course this should only apply to severe CoC violations considering that two different CoCs rarely overlap in full.

So the reason for the ban was that hyprland’s developer published their email exchange and wrote an extensive, surprisingly hostile blog post about it.

I genuinely recommend reading their exchange, I’ve rarely seen this amount of hostility and toxicity in an email exchange - followed up with “I hope we can resolve this constructively” and “I will be seeking legal action if you continue threatening to ban me”.

It’s an idiom about admitting you’re wrong.

In other words, you could write the sentence as:

“If there has been significant positive change since then, I admit that what I wrote was wrong.”

I’m not actively following it since I stopped using Hyprland around that time.

If there has been significant positive change since then I stand corrected.

No, this was an instance of transphobia in their official Discord community. See this for context.

Another instance is how Hyprland’s developer is banned from contributing to freedesktop.org for repeated COC violations.

Hyprland has a right-wing reactionary community surrounding it. For instance, on their Discord a trans person had their username’s pronouns changed to (who/cares) by a moderator after being upset that they were misgendered.