It would be a full time job if she was expected to speak out about every cause, or are you just concerned about the trending ones that allow people to virtue signal.
Because if you are annoyed she hasn't spoken out about the situation in Gaza, then surely you would also expect her to speak about:
Sudan – Genocide in Darfur (Masalit people)
Myanmar – Rohingya genocide, military atrocities
Ethiopia – War crimes in Amhara and Tigray
Democratic Republic of Congo – War crimes, ethnic violence
Nagorno-Karabakh / Armenia – Ethnic cleansing of Armenians
Afghanistan – Taliban persecution of women, minorities
Haiti – Gang violence, murder, rape, child conscription
Southern Kaduna, Nigeria – Ethnic and religious killings
Mali – Executions by army and Russian mercenaries
Amazon Basin (Brazil, Peru, Colombia) – Indigenous violence and cultural genocide
Personally, I think it is far more effective when people focus their energy on causes they feel passionate about, rather than bowing to pressure to tick a box to prove they are falling in line with whatever cause has people obsessing.