Also mentioned in https://support.supermetrics.com/support/discussions/topics/19000019517
I think Custom Channel Group still is not included. I already searched for missing metrics but no result is showed up. When will it be possible to have custom channel grouping in supermetrics?
thanks for asking. If there's no metric or dimension for fetching your Custom Channel Groups through the API, unfortunately it's not possible to add it in to Supermetrics.