this is not possible with home sleep tests. They will often claim to do this by using pulse transit time as a correlate for eeg arousal but that does not imply high sensitivity. People should be getting their sleep tests in lab as much as possible, home sleep tests are trash
AFAIK No HSAT is cleared to score RERAs, most of them will score an airflow limitation without a great enough desat to constitute a hypopnes and label it as a “RERA” because they have similar signatures.