Could indeed be a climber, a bit of a mystery. I have had this rose for two years now (zone 6a/b) and the first year it produced a very thick, long cane. Unfortunately it was broken by a neighbour's dog before I could fix it. I also did not expect that to happen, so I did not know what to do with it. It was so thick and long that it looked completely out of place for this rose (which was not supposed to be a climber). The second year I kept an eye on the new growth but nothing of the sort happened. The rose kept its small, delicate shape, with thin and rather short canes, elegantly spaced, nothing resembling a climber.

Available from - Rosiers André Eve
https://www.roses-andre-eve.com/rosiers-buissons-a-grandes-fleurs-collection/2096-peter-paul-rubens-vispeparu.html

Available from - tuincentrum Lottum
https://www.rozenlottum.nl/en_GB/a-58507416/all-available-roses/peter-paul-rubens/#description

Available from - Royal Paradise Garden (via Amazon)
https://arcus-www.amazon.in/stores/page/A59B37D7-FEA9-4069-86FD-955D7DD23412/search?ref_=ast_bln&terms=peter-paul%20rubens