Pelosi's policy was enforced by Sgt. at Arms Irving, her direct report:
Former House Sergeant-at-Arms Paul Irving said he believed congressional leadership would be wary of military at the Capitol on Jan. 6.
www.huffpost.com
"Irving did not float the idea by House Speaker
Nancy Pelosi (D-Calif.). Instead, he rejected then-U.S. Capitol Police Chief Steven Sund’s request to activate the National Guard based on what he believed would be Pelosi’s position on the matter."
Not only Sund's request, but Trump's request to "fill the request"
Washington DC Mayor Muriel Bowser sends a letter to the Acting United States Attorney General, Secretary of the Army, and...
fightwithkash.com
"Washington D.C. Mayor Muriel Bowser sent a letter to Acting United States Attorney General Jeffery Rosen, Secretary of the Army Ryan D. McCarthy, and Acting Secretary of Defense Chris Miller explaining that Capitol Police were ready for the First Amendment activities taking place in the the lead up to the January 6 storming of the Capitol."
There is a separate thread about "Pelosi's dereliction of duty"