This Orlando page has to discard the old impression first.
The ride Antarctica: Empire of the Penguin closed on March 16, 2020. The current focus is the indoor family coaster Penguin Trek, the real penguin habitat in Antarctica Realm, emperor penguins, and add-on experiences such as Ultimate Penguins on Ice and Penguins Up-Close Tour.
SeaWorld’s official site now says it plainly: Orlando is a place in the Western Hemisphere where visitors can see emperor penguins. That immediately separates it from most U.S. facilities.

What to see
The official Ultimate Penguins on Ice page says participants enter a habitat kept around 28°F, beside 6 penguin species. That count includes the newly added emperor penguin and gives king penguins, Adélie penguins, gentoo penguins, chinstrap penguins, and macaroni penguins a shared comparison scene.
Penguin Trek acts as the new entry point. You are not only riding a track; the attraction leads you back toward the real habitat, ending with penguins moving through cold water.
That arrangement is very theme-park, and very Orlando.

How to plan it
If your group only wants to see penguins reliably, Antarctica Realm itself is enough. If you want close-range husbandry details, then consider Up-Close Tour or Ultimate Penguins on Ice.
For another SeaWorld comparison, SeaWorld San Diego keeps the more classic Penguin Encounter model, while Orlando pushes Penguin Trek and emperor penguins forward.
The warmer Penguin Encounter area also preserves another angle: not every penguin lives in ice and snow. That pairs well with the African penguins at San Diego Zoo.
Prices, time slots, height rules, and photography restrictions change. Cold experiences in particular often involve clothing and mobility requirements, so read the same-day terms before leaving.
To place those cold-room species back in a wild-region frame, continue to penguins in Antarctica.

Penchan Says
SeaWorld Orlando should not be written around the old ride anymore.
The useful thing to remember is the transition: after a closed attraction left the stage, the park re-centered penguins around habitat, close-range experiences, and the rarity of emperor penguins. That is more useful than nostalgia.
References
FAQ
Is Antarctica: Empire of the Penguin still open at SeaWorld Orlando?
No. The ride closed on March 16, 2020; the current focus is Penguin Trek, Antarctica Realm, and penguin experiences.
How cold is the SeaWorld Orlando penguin experience?
The Ultimate Penguins on Ice page says participants enter a habitat kept around 28°F.
Why is SeaWorld Orlando notable for penguins?
SeaWorld says Orlando is a place in the Western Hemisphere where visitors can see emperor penguins, separating it from most U.S. facilities.