Canon TS705 in Ubuntu - Can't select paper source

[2CV67]

Hi!
I have a Canon TS705 printer working in Ubuntu 20.04
I am using Canon driver cnijfilter2-5.80-1-deb for which Canon say they provide no support.

Mostly the printer works very well.
But I am unable to select the top/rear paper source, this choice being greyed out.

Did anybody manage to find a way to select paper source?

Thanks for any suggestion!

 

[victor gabriel marian]

I have it also installed in Opensuse. No paper source is shown.