2-side / duplex option no long available in Canon Print android app?

[n33]

I have a Pixma MX920 and have been using the Canon print app and Canon printer service app on my android phone for 4 years now to print documents directly from my phone over wifi.

Up until a few months ago, I was able to print 2-side documents (i.e., duplex printing) and it was always an available option on the apps. However, I recently noticed that the option is no longer there, or is greyed out and I cannot select it!

I have duplex auto printing selected on the printer driver settings page on my PC (from which I can print duplex just fine), and my paper type is set to Plain Paper and the regular 8.5x10 size. Any idea how to restore the duplex printing functionality (or why it was removed) in the android apps?

[shadowsports]

Greetings,

I still see it in the app.  It's listed under print settings. I'm running Pixel 8, Android 15, March security patch.  Canon Print App v3.4.0.

[n33]

That's strange, I am running the same app version but on Android 14 and don't see it under print settings...