Last generation we got one normal version of each Tapu, but only Tapu Koko got any Ultra Rares. I suspect the same thing could happen again this generation, since we got Tapu Koko ex in Paradox Rift and are due for another one in those decks. It's worth noting that Tapu Lele didn't get its normal print until the end of the Sword and Shield era, so we can't count Tapu Lele and Tapu Fini out until the curtain falls (P.S. I remember when google Gilbert thought Tapu Lele would be the ideal Gardevoir ex partner, and JustInBasil thought Gardevoir ex would only use Pokémon from within it's own line, including Gardevoir and Gallade from Chilling Reign. The road to Tord Garde was a long and bumpy one).
I'm curious, is Tapu Koko a popular Pokémon? Did its prominent role in the anime make it one of the most iconic Alolan Pokémon? Is it perhaps just a favorite of the design team (google learned in an interview with Pokémon Card Labs that Darkrai is a favorite Pokémon of one of the designers and gets a lot of attention as such). Or is there a different reason why it gets the most attention of the Tapu?