Thomas completed high school at Linden Hall (Lancaster, Pennsylvania, USA), where she was on the tennis team, soccer team, drama club, debate team, student council, and National Honor Society.[11] She initially planned to pursue a "safe career" and go into global public health, graduating with a Bachelor of Arts in Biophysics from Carnegie Mellon University in 2016 and then a Master’s of Public Health (MPH) (studying Health Policy with a concentration in Global Health) from Yale University School of Public Health (YSPH) in 2018 with the goal of promoting health equity.[12][10][13] While at the former, Thomas was a member of the Beta Nu chapter of Delta Gamma Fraternity.[9]
Thomas worked in a maternal and child mobile health clinic in Northern Kenya and the Kakumah Refugee Camp on the Kenya-Sudan border.[13] She gave a TEDxYale talk titled “Charity, one hell of a drug” addressing the issues of donor aid dependency during the second year of her MPH.[13] Thomas is the founder of the women-empowerment health app Enki (stylised as enki) which helped supply female condoms to combat HIV/AIDS.[14][10] Thomas is also cofounder of a startup called Mosaic, which is an online platform for refugees to sell goods around the world and in turn provide for themselves and their families.[11] Thomas also worked as an associate of the United Nations Population Fund and was a fellow of the Global Health Justice Partnership at Yale University and a board member of the Adebisi Babatunde Thomas Entrepreneurship Institute (ABTEI) in Nairobi, Kenya.[15][11] Thomas also volunteered with Habitat for Humanity and International Refugee and Immigration Services (IRIS).[11]
In 2020, Thomas participated in online Shakespeare readings with the Market Theatre in Johannesburg.[17] After signing with her agent Gary O'Sullivan of Accelerate Management in South Africa and London,[18] Thomas landed her debut feature film role as Rebecca in Redeeming Love, which premiered in 2022.
Also in 2022, it was announced Thomas would play young Lady Agatha Danbury (played by Adjoa Andoh later in life) in the Netflix period drama prequel Queen Charlotte: A Bridgerton Story, which premiered in May 2023.[19][20] Thomas learned she had been cast while working as a butcher's assistant in Notting Hill.[21] In preparation for the role of young Lady Danbury, Thomas read anti-racist and feminist literature by authors such as bell hooks, Angela Y. Davis, Zora Neale Hurston, and Assata Shakur, as well as drawing insight from her grandmother, who had an arranged marriage at the age of 7.[10][22] Thomas also put on an English accent throughout the audition process.[23] During the press tour, she was primarily styled by fashion stylist Amy Zama, Susan Oludele from HairBySusy Corp, and makeup artist Tenelle Veira.