This rose seems to strike surprisingly easily if you get a good example. I put three cuttings in a resealable bag on January 28, 2021. By February 26 all three were starting to show roots at the bottom of the bag. The cuttings were taken from an old plant, which presumably was budded before the cultivar was weakened by excessive propagation (if that legend about weakening is actually true in Australia).
The heritage roses article on propagation* says 'As a rough guide: for rambler roses, you can start looking for roots at 3- 4 weeks; for Tea roses from about 6 weeks. HTs, especially the yellows, are much slower and have a lower success rate.' Yet here is an HT, with a fair amount of yellow/foetida in it, striking with 100% success rate in 4 weeks. You can be lucky.