I've deployed a PWA to firebase hosting and there are 2 URLS.
This one works: app-name-axdax.web.app
This one generates the following error on an app when used:
app-name-axdax.firebaseapp.com
Not sure why the firebaseapp.com link isn't working on an app, I followed the tutorial precisely. I need that feature so users can add the app to their homescreen.
Firebase DNS does take some time to propagate on newly created projects and can take up to 24 hours to finalize.
If you believe it has been long enough, You can attempt a cache refresh (Ctrl+F5) or try another browser.
If it has been 48 hours and no change, You should contact Firebase support who can debug the settings internally.