I would have assumed the win here would be that your Linux distribution or package manager on another OS can compile "VSCodium" themselves -- and you already trust them for all your other software, so this simplifies the trust chain somewhat.

In reality I think distributions that are willing to ship binaries (NixOS, Homebrew on MacOS) ship VSCodium, and other distributions (Alpine) have packages called things like `code-oss` that are basically the distribution's internal compiled version of VSCode and have nothing (?) to do with VSCodium.