Hormones are just a signaling mechanism that affect behavior.

Some future hypothetical conscious AGI would have feedback and signaling mechanisms, as well, including internal reward mechanisms.

We can talk about robot biomechanics even if they’re operated on stored electrical charge on servos and motors, rather than ATP and myofibrils. The underlying chemistry doesn’t change the level of analysis we’re talking about here, because the lower levels create analogous higher level systems.