Laura Berwick (“Belfast”), Tanya Seghatchian (“The Power of the Dog”), Nina Yang Bongiovi (“Passing”), Rachel Shane (“The Eyes of Tammy Faye”), Stacey Sher (“Respect”) and Nina Jacobson (“Impeachment: American Crime Story”) will join the “Producers Roundtable” at Power Women Summit 2021, the largest gathering of women in media and entertainment streaming on-line from Dec.