Maggie Simpson has publicly advocated for improved care and outcomes for women with heart disease, particularly in relation to pregnancy and congenital conditions. She has spoken at professional and public events, contributed to policy development, and raised concerns on social media about sex- and gender-based inequalities in diagnosis and treatment. Her research and clinical interests are focused on heart failure, congenital heart disease, and cardiac care during pregnancy. She supports a transparent and inclusive process for setting shared priorities.