There seems to be a lot of confusion regarding this point. A lot of the dossier has been proven true, some hasn't been proven (yet?) and only one thing has been disproven: https://twitter.com/SethAbramson/status/1456306559756156930
This whole Twitter thread by Seth Abramson is really informative: https://twitter.com/SethAbramson/status/1456299800735870976