Stop saying that Electron apps are cross platform!
They only run on one platform, the web. In order for people who use Linux/macOS/Windows to be able to run them, they require a translation layer, the Electron runtime, that they all ship with.
It's like when TeamViewer used to ship the Windows version with a copy of Wine as the Linux version. You can run that on Linux indeed, but that's neither a Linux app nor a cross-platform one.