Hyperactive delirium is the overactive form in which a patient can be aggressive and restless, sometimes suffering delusions or hallucinations Hypoactive delirium is the underactive form in which patients may appear sleepy, slow to respond and are withdrawn, not communicating with others. And it’s possible for a patient to have a mix of the two.

https://health.clevelandclinic.org/coronavirus-symptom-delirium/