All this grift is probably happening in the Middle-East too but it appears Jared Kushner is just better at covering his tracks than Giuliani is.
I would say more it's just the situations are different. Manafort brought a lot of press to Ukraine and of course with Russia involved, things are illuminated a little more easily. Lots more eyes on it.
Meanwhile, no one gives a shit about what's going on in the Middle East. We allowed the Obama administration to enrich the Saudis and help them genocide Yemen for years. And Saudi Arabia is a known "ally", and of course more $$$$ is shared between the 2 than Russia. Fewer eyes on that one, or more like more complicit eyes watching.
But even Kushner has fucked up and I think a dedicated SC with Mueller's resources would have had a field day with Kushner's antics in the Middle East, very much including Israel here. A goddamn bonanza.
But even the Steele Report makes mention how Trump's team were happy we were really focused in on Russia over the other states actively interfering in 2016 and making bribes and committing extortion...