r22 has a much lower ozone depletion potential than r11/r12, which were used as refrigerants before. AC use in developing countries is more a global warming issue than an ozone shield issue. A lot of replacements are highly potent greenhouse gases.

The ozone shield had a 4 percent loss since the 70s in average, much larger local losses aka "ozone holes". Fortunately not many people live at the north or south pole.

This sheds some light on what it took to get enough support to actually change regulations:

https://www.sciencehistory.org/distillations/podcast/whateve...