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.
In order to check the official roster at my.scouting.org, a leader needs to be: Unit Key 3 (CM/SM,CC/COR), Key 3 Delegate, or (I think) have the Membership Inquiry role assigned. Key 3 Delegates and other functional roles are assigned in the Position Manager under Roster in the left-side menu at my.scouting.org.
Go to your unit roster, click on this leader’s name, select the Admin role then click update without making any other changes. That should reset her connections to all Scouts.