[m463]

I suspect the practical reason they are not retrofitted is that few if any toilets in the US have a power outlet next to it.

[remexre]

They're hydraulically powered, not electrically; no outlet required, the same water intake that the jet uses is used for the mechanism as well.

[johnwalkr]

Luxebidet are, but the parent comment to yours is referring to Toto washlets, I think.