Then present yours lol

Sentientism answers the question of “who/what matters?”, not “what ethical framework should be used to care about who/what matters?”. It can underly many ethical frameworks, personally I don’t care that much what ethical framework you use as long as we can agree on who’s included in the moral scope (although there are some utilitarians who I think have bad definitions of utility and/or do a bad job weighing the utility)