Emotions tend to manifest as physical sensations, and if you don't think that's true it's likely you haven't been paying attention. See also https://www.theatlantic.com/health/archive/2013/12/mapping-h...

But that is just our nervous system that is located in both the brain and the body, they are obviously one connected system. Sure you can have reflexes and simple learning without a brain, but you need cognition for feelings. That is sort of the definition of what feeling are.

One popular definition: feelings are the subjective, conscious mental experience of an emotion, or the conscious perception of bodily states that arise from physiological and neural responses to stimuli