By sentience I assume you’re talking about consciousness. The fact that it feels like something to be. I think it’s somewhat safe to assume a true AGI system would also be consciouss (if feels like something to be that system) but I don’t think it needs to be and even if it was we couldn’t know for sure. Consciousness is entirely an subjective experience. We can’t even prove other people are consciouss. It’s just a safe assumption. I can also imagine a consciouss system that might not be generally intelligent. Does it feel like something to be a fish? Probably. Are they generally intelligent? Probably not.