Welcome! This forum has a treasure trove of great info – Scouters helping Scouters! Just a heads up, though - all content, information, and opinions shared on this forum are those of the author, not the BSA.
When you are made a den admin, you are supposed to be given full control connections to all Scouts in your den. This did not happen. I will ask the developers to investigate why you did not get the proper connections.
I recommend you ask a Unit Admin (usually the Cubmaster is one) to go to your Den Admin role and click Update without making any changes. This should reset your connections to the Scouts. If this does not work, the admin can go to your Den roster page, select Connection Manager, click on your name then click on the Full Control check box to give you full control connections to all Scouts in the den.