Electron apps don’t work well across all of the Linux distributions if you’re doing anything that isn’t very simple.

The comment was that the Electron apps aren’t being released for Linux even when they exist because Linux is so much harder to support, even in Electron.

If they don’t have resources (or desire) to keep the Electron app working on all the Linux distros then they definitely won’t have the resources to write a completely separate GTK app for the few Linux users.