If you able to see the data source in RSA6 means data-source is active.
Have you received any errors while activation?
And the indicator which you are talking about in RSA6 is a new feature implemented in 740.
The green/red flag shows if the data source is released for ODP or not.
See this more details,
Note: 1558737 - Data Sources released for ODP data replication API
Thanks,
Bhavin Vyas