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 I open the Edit Den pop-up in ScoutBook Plus, I see boxes with Available Scouts, Scouts in Den, Available Adults, and Adults in Den. None of my four Den Chiefs appears in any of those boxes.
It looks like it’s not there any more. I’m checking with the developers whether it was removed on purpose or not. If you provide one of their bsa member numbers, we can look them up, but I’m not certain it will tell us anything.
In my testing this morning, I saw that the pack has no visibility into whether the troop has approved the den chief position. The only symptom is that they do not appear on the SB+ roster or as possible invitees to events.
Problem solved. Thank you, Donovan! The Den Chief position on his leadership page now bears the white-on-green check mark of approval, and his name now appears on the pack’s roster in Scoutbook Plus.