As royal consort, Sibonelo serves a patron of Limkokwing University of Creative Technology and the Eswatini chapter of the Heal the World Foundation.

She has accompanied the king on various international visits, including the Diamond Jubilee of Elizabeth II in 2012, the United States–Africa Leaders Summit in 2014, and the Coronation of Charles III and Camilla in 2023.

[4] When Sibonelo was sixteen years old, she met Prince Makhosetive of Swaziland while performing in the annual reed dance.

[3][5] Shortly after, when she was seventeen, Prince Makhosetive was crowned as King Mswati III and chose her to be his wife.

[1] Although qualified to practice law in Eswatini, she is not permitted to do so as the royal family object to the idea of her working a common profession, and because a royal involved in law is seen as a potential disruption to the judicial process, as judges may change rule in favor of cases presented by the queen.

[14] She is the founder of the Lusito Charity Organization, a South-African charitable foundation that provides financial assistance to people living in poverty and pays for orphaned children to receive an education.

[1][9] In July 2013, Sibonelo was appointed as the honorary patron of Limkokwing University of Creative Technology and the Eswatini chapter of the Heal the World Foundation.

[8] Mayibongwe Masangane, the Secretary General of the Swaziland Democratic Nurses Union, criticized the royal family upon the queen and princess's admittance to the hospital, stating: "[The monarchy] destroyed the health system and now they are rushing to such clinics because they can afford the bills.

Other queens are suffering at the hands of the king, he doesn’t want them to socialise with men that he sees as competitors, he has a low self-esteem.