She has been involved with children work and protection since ( at least ) 1979, P. Grace being still alive. 1979 was the International Year of the Children and, by then she was already participating in meeting and sessions. She was appointed by her parents was appointed to « become the President of the Monegasque Committee for the International Year of Children ». Later in 1981 she founded « Jeune J'Ecoute »... You can read all this here
https://www.palais.mc/en/princely-family/h-r-h-the-princess-of-hanover/biography-1-8.html
and those of us who have bee following her work throughout the years know that she is actually commited in all these, it's not just keeping up with appearences. She travels places, she knows the situation in the field...
She was pushed to the role of first lady by her mother's death, but she certainly worked hard enough to be worthy of our admiration. Plus, she never wanted to be first lady... She was driven to be so by circumstances, and let's be honest, it was P. Caroline that held that family together after Grace's passing