Frozen Planet II

Polar bear

Ursus maritimus

Svalbard, Norway

Arctic ringed seal

Pusa hispida hispida

Svalbard, Norway

Beluga whale

Delphinapterus leucas

Penkigngei Bay, Beringia National Park, Russia

This sequence was filmed in Beringia National Park where, in April 2021, between 20-50 beluga whales were found stranded in Penkigngei Bay across three polynyas (holes in the ice) [1]. The shot at 10:00 matches exactly with the image used by the Siberian Times reporting on this news on their Facebook page [2] and by Meteovesti on their website [3].
[Link 1] [Link 2] [Link 3]

Beluga whale

Delphinapterus leucas

Canada

Narwhal

Monodon monoceros

Canada

Harp seal

Pagophilus groenlandicus

West Ice, Greenland

Skeleton shrimp sp.

[family Caprellidae]

Norway

Bowhead whale

Balaena mysticetus

Bukhta Vrangelya, Sea of Okhotsk, Russia

According to the media pack [1], bowhead whales were also filmed in Canada - perhaps these constitute the opening shots of the sequence. The overhead shot at 25:16 is almost certainly Wrangel Bay (Bukhta Vrangelya), which is a well-known bowhead whale-watching site. The shapes and chalk-like colour of the rocks lining the coast throughout the sequence match this bay perfectly, as seen in an image from Wrangel Bay by Yuri Smityuk [2]. Finding on Google Maps the exact location of Wrangel Bay, despite being a popular wildlife destination, was harder than I expected. A more famous wildlife destination also in Eastern Russia is Wrangel Island in the Chukchi Sea. Then, there's Bukhta Vrangelya in the Sea of Japan, far to the south of the Sea of Okhotsk... Luckily, someone else had gone through the same confusion; on Eugene Kaspersky's blog [3], he discusses the various similarly named locations in this region of Russia and helpfully provides the exact coordinates of the Wrangel Bay in question.
[Link 1] [Link 2] [Link 3]

Killer whale

Orcinus orca