The Airbending moves that Korra teaches Opal are the same ones that Aang and Katara did in “The Headband”
To be technical the sequence with Aang and Katara is single palm change from the swimming dragon Bagua. The sequence with Opal and Katara is the Double Palm change from the same practice set. I just think it’s so cool to see these movements taken from reference that I had generated in animation!
Thanks for the additional information sifu-kisu