Actually, so did the indictment of Manafort and Gates. The first charge against them, “Conspiracy against the United States”—to wit, “impeding, impairing, obstructing and defeating the lawful governmental functions of a government agency, namely the Department of Justice and the Department of the Treasury”—relates to actions “from in or about and between 2006 and 2017.” So it covers the period in 2016 when Manafort was chairman of the Trump campaign, and Gates was working with him.
Similarly, the twelfth charge alleges that, “on or about November 23, 2016 and February 10, 2017,” in seeking to distance themselves from Viktor Yanukovych, the pro-Russian former President of Ukraine, and his party, Manafort and Gates made false statements and created fictitious documents. Manafort cut his official ties to Trump last August, after the Times reported on some of his activities in Ukraine. But, in November, Gates was part of the Trump transition team. And, this February, he was working for a pro-Trump super pac. Even after he left that job, in March, he reportedly made multiple visits to the White House.