>>7244663
I've answered this before but it's less about the pairing and more about takos. Takos don't actually care too much about pairings despite what others claim.
Not just Ame, Gura, etc. but also Nene and Lamy are far from entertained as a pair to Ina. Every "pairing" Ina is in gets fanart from people who are fans of the other party (teamates, yumikin, nekkos, etc.) as Takos all are focusing their efforts in perfecting the best drawing of Ina they can do.
Even Iname prime is a teamate first.
As such, Takotori art is rare because it'd rely on Kiara's artists to draw it, and Kiara's artist will draw it only if they accept Ina and Kiara as a pairing.