The Agfa recommendation is 18 films per 125ml of Rodinal concentrate, which works out at just under 7ml per film. I presume they mean 36 exposure 35mm, which has the equivalent area to about one and a third rolls of 120.(posted 8458 days ago)
So, just over 5ml per 120 film is within Agfa's spec.
I admit I've personally never used Rodinal with 120 film at those high dilutions, though.