Cultural event
Iroh takes advantage of the opening of the Jǎawːḷch̊ëiishøf parliamentary session (at which the High Sages are present) to give Zuko a platform to announce his choosing of a consort to be his hàkh.
Sokka, of course, cannot be present for the announcement, since humans are not yet cleared for interstellar travel within the Federation and Zuko and Iroh are responsible enough to not bend that rule too much. He gets to watch the livestream in Zuko's office in the Federation embassy with the rest of the fam, though.