There's a long conversation here about how ML differs from "human" cognition, but we're not going to get a lot further until you define functional vs felt.

Besides, how you "feel" again depends on the condition of the body. Flood it with adrenaline and you feel excited or scared. Suppress dopamine and serotonin and you "feel" depressed.

Again, we don't understand human learning. Yet. We don't understand memory formation and storage and retrieval in the brain. Yet. But it's obvious those mechanisms exist.

And that they're highly associative. A memory of an event can be strongly cross linked to how you felt at the time: emotional state, what you were hearing, smelling, tasting, seeing, and so on.

And you are you largely based on the stored accumulation of those memories. Erase them and are you still you? Find and replace all the memories of your name being Paul with Fred, and are you still you?

Replace enough of your memories with mine, and are you you, or are you me? Or just another piece of wetware running a copy of me?