Granular billing details

Most AWS services are metered as multiple dimensions yet in Cost Explorer I can only see a single $ value which represents the service charge. For example. Secrets manager is priced as a combination of $0.40 per secret per month + $0.05 per 10,000 API calls.

If my monthly charge is $15/month, how can I see a detailed breakdown of the billed API calls that have been charged?

Thanks!