Not quite production, but I was on a paid contract on a PoC. I would say back at 1.0, mobile was pretty painful and signing of any binary dependencies was up to you. It looks like they addressed signing in 1.5 and I haven't picked it back up to check out the mobile experience.
The traditional alternative to Electron on mobile platforms is Capacitor (which uses the system webview, so in that sense it's closer to Tauri):
(fka Apache Cordova, fka PhoneGap)
https://tauri.app/
Does anyone have any experience creating production apps with Tauri? Seems like a sane alternative to Electron, especially if they can target all major platforms and keep the promise of smaller footprints.