Greetings @SismeyR,
Thanks for the post.
I understand that you are unable to paper tray to print on photo paper using HP AIO Remote app, is that right?
Not to worry, I will be glad to help.
Are you facing any print quality issue while printing on regular paper?
If the option to select the paper tray is not available on the app, as a work around, empty the paper trays, load only photo paper in the printer and try to print.
The printer would select the paper tray which has paper. Click here to know more about HP AIO Remote.
Let me know if the workaround works for you.
Chimney_83
I am an HP Employee