My father set parental controls on our then new Playstation 3 years or so and now all Rainbow six Siege editions and add-ons are displayed in the Playstation Store, just not the standard edition, although I have switched off all parental controls? Is that the case with some games?
I think they only exist at such "events" from playstation itself, e.g. January offers, the rest are edition where you get more operators. For the beginning practical but costs a bit more, but you can order the standard version on ebay amazon or buy it at Gamestop.