No electron app ever looks good anywhere. They are consistent insofar that they look shit on all OS, equally. And alias their fonts wrong. And scale them wrong. And break accessibility.
Sure, there's always a bar to clear. And yet Electron can't even properly alias fonts if the creator doesn't do it properly, as it tries to use Chrome's broken font rendering by default. Nevermind scaling the size of anything, which just becomes a blurry mess if the app wasn't created well enough (see the mess that is Signal as an example).
Voyager is made with Ionic. The difference with Electron is that in Ionic, trough Swift/Kotlin, shows a WebView from the System Browser (mobile only) while Electron “installs” Chrome each time (desktop only).