It is a limitation of a PWA. A native app (wrapper) will likely be coming though, and a custom Capacitor plugin could theoretically interface with the native API to switch out icons. Theoretically. No promises though :)
Quoting this comment by the dev
How is your performance with Voyager?
In my opinion, it’s been great and feels pretty close to native anyway. Some issues with the screen freezing when trying to scroll after swiping away from a post but other than that, it’s super nice. Plus updates are so quick to install, really like that too.
Problematic
I get lots of random freezes, actions not registering, etc
Doesn’t make it unuseable, but it’s not a great experience
With all browsers?, here runs fine with chromium.
The main issue is Safari, bugs in webkit bog everything down. And iOS is stuck with it.
No browser as far as I know. I installed the PWA and haven’t touched anything else.
I’m on iOS exclusively with no plans to use a desktop interface
I think it’s acceptable, though I am working on my own … for now experimental … Lemmy client in C++/Qt/QML … maybe eventually for desktop and mobile devices alike :)
A desktop client would be a game changer for sure.