After looking around at sites (though just started checking this site yesterday), I found this, which explains why the bulk of the information was not in the SDIG format.
Notes of Rudolph Giuliani's interviews with two former Ukrainian prosecutors include one's allegation that then-Ukrainian President Petro Poroshenko warned him against investigating energy firm Burisma Holdings “as it was not in the interest of Joe and/or Hunter Biden.”
The notes were published by a Ukrainian news site, and their authenticity was confirmed by Giuliani, President Trump's personal lawyer, and by a second source who has seen the originals and who declined to be identified. But RealClearInvestigations could not confirm the prosecutors' assertions as presented in the notes.