I take it the dataset isn't available anywhere for download?
As far as I can tell, the data for this investigation is not (yet?) accessible. https://www.occrp.org/en/troikalaundromat/about-the-data has some information about it, and includes an address to contact for journalists who want to gain access.
The leaked info seems to consist of bank statements. It's unlikely that any bank conducts illegal transactions only, so it is understandable that they cannot release the data to the public without harming lots of legitimate customers.
That's a platform designed for journalists that indeed contains a lot of scraped data and leaks. It cross-references them, so you can type in a name of the person/company and see the data points mentioning them. Some of the investigations got started precisely because journalists were able to use it to see a connection you can't see otherwise. It handles all the quirkiness that arises from dealing with different alphabets, and it accounts for multiple ways you could type a name from a different alphabet into Latin.
The administrators of it manage who gets to see which data sets for obvious reasons. Knowing nothing about this specific investigation, I assume that the data is currently only accessible to the pre-approved journalists (that work on this investigation).
The code of the tool is available on GitHub, and if you happen to stumble upon a security issue: https://www.occrp.org/en/responsible-disclosure
We're working on it. There's a whole back log of reporting that people have invested months into doing, we'll successively push out parts of the data once those stories are getting published.