If you have ensured your personal profile is an Admin and you have added the CinchShare app in the Group settings correctly, then most likely it’s there but hidden. In order to see every networks you will need to “Show All”.
This feature allows users to select networks to hide, allowing you to customize the networks displayed https://www.youtube.com/watch?v=3CBuSDd39ik.
You can click ‘Show All’ on your My Networks page, using the eye icon:
When you do, all of your networks will be shown. You will then just need to click the eye icon of the group to make it a shown network, and/or select the heart icon to make it a favorite network.