No VS Codium is just a alternative build of Visual Studio Code.

> This is a repository of scripts to automatically build Microsoft's vscode repository into freely-licensed binaries with a community-driven default configuration.

https://github.com/VSCodium/vscodium

I thought it was similar to the Chromium/Chrome situation. The naming implied that. But I don't use it and don't follow it that closely. Thanks for the clarification.