In 2023, this model was released in the 2023 Advent Calendar #700728. Included was over 35 items, including 7 horses, 2 foals, 1 unicorn, and 3 rider dolls.
Palomino Prancing Foal #700728 from the Advent Calendar, and 'Leo' #300193, have the same markings. The Advent model appears to have a slightly different shade of palomino, and the legs are painted white; whereas the Leo model appears to have bare plastic white legs.