She had been with the team since 2018
How Katie Sowers became the first woman and gay coach in the Super Bowl
49ers Pioneering Assistant Katie Sowers Won't Return in 2021 – NBC Los Angeles
Planting seeds: Women look to grow ranks as NFL coaches
49ers pioneering assistant Katie Sowers won't return in 2021: reports
Katie Sowers parts with 49ers after four seasons in pioneering role – Daily Democrat
Kathryn_Smith
Dee Ford saga could lead to 49ers changing their game plan
Katie Sowers is the first woman to coach in a Super Bowl. Her goal: 'Make sure I'm not the last.' - The Washington Post
KRYK: Super Bowl's first female coach hopes she's 'not the last
49ers' assistant coach Katie Sowers becomes first openly LGBT NFL coach