What do you mean by "services"?
You can see what apps are installed by selecting "Manage apps" from the Apps menu.
It's not clear what you want to know about what you are ingesting. The inputs themselves probably are defined on your on-prem forwarders so are not visible from Splunk Cloud. Of course, the actual data ingested is visible in the indexes.
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If this reply helps you, Karma would be appreciated.
