I think Pixelorama (I’m on mobile right now so don’t want to drag up a link) is also FOSS and has a more comparable feature set.

FreeCAD is probably what you’re looking for, it had a bad UI but just released 1.0 recently and is pretty decent now. Also I really recommend checking Pixelorama over libresprite for a FOSS pixel art tool.

That’s not exactly what happened, they pushed more of their code into their own library that was not permissively licensed but then they open sourced it so the issue was resolved. https://github.com/bitwarden/clients/issues/11611#issuecomment-2436287977