The Executive Order was in play as early as September 10 and maybe earlier. (First mention I found though without doing very deep dive).
United States Sanctions Russian Actors and Proxies for Efforts To Interfere in ElectionsPress StatementMichael R. Pompeo, Secretary of StateSeptember 10, 2020
Today, the U.S. Department of the Treasury’s Office of Foreign Assets Control (OFAC) sanctioned four Kremlin-linked individuals for their efforts to interfere in United States elections.Treasury designated Andrii Derkach pursuant to Executive Order (E.O.) 13848, for his efforts to influence the 2020 U.S. presidential election. Derkach maintains close ties to Russian intelligence and sought to influence the views of American voters through a Russian-directed covert influence campaign centered on manipulating the American political process to advance Russia’s malign interests in Ukraine. This operation was designed to culminate prior to Election Day.
Part of executive order 13484 took effect starting January 11, 9:30am I’ll get the link to the WH page
The Executive Order was in play as early as September 10 and maybe earlier. (First mention I found though without doing very deep dive). United States Sanctions Russian Actors and Proxies for Efforts To Interfere in Elections Press Statement Michael R. Pompeo, Secretary of State September 10, 2020
https://www.state.gov/united-states-sanctions-russian-actors-and-proxies-for-efforts-to-interfere-in-elections/