Incidentally, if you have a business registered for GST in Australia you have to submit a quarterly activity statement. The tax office website had bizarre authentication requirements but the browser plugin was at least cross-platform. They now require you to use the myGovID app, which is - you guessed it - available only on the App Store and Play Store. You can't even run a business without being part of the duopoly.…
As per that site, you can still deal directly with the govt and avoid MyGovID.
It's one of the few closed source apps I have on my phone and forces me to install a workaround like yalp in order to get it. (playstore requires a google login to use)