

At least some penguin species need sea ice to breed, and Antarctic sea ice extent has dropped off a cliff in the last decade (a starting in 2016) (source: went to a plenary about sea ice at the AMOS conference in Aus at the end of June)
I think what ever happens in Antarctica, it’s likely to be complex…
Sea ice (most of the arctic) is VERY different to land ice (which is most of Antarctica). Check some sea ice maps and ice thickness maps to see the difference.
Also, the two hemispheres are not tightly coupled over short (decadal scales). The Arctic has been warming much faster than the Antarctic (so far).