No, Anna and Elsa as of yesterday when they switched parks are appearing only at their meet and greet at MK. Rapunzel only meets at her meet and greet at MK (she has moved into a room with Cinderella as of yesterday).
Also, I should probably point out that Akershus in Norway is only part "buffet". It is really more of a salad bar, although it does have cold cuts and salmon. The main meal is ordered from a menu and served at your table.