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.
SB Needs a mechanism for parent, leader or scout to remove the Google sign-in linked to a Scouts account. A Scout with google linked SB account can not log in to Scoutbook. This is due to Google policy now restricting less than 13 years old to using Google login on the Scoutbook page.
Ultimately - Scoutbook should not allow scouts under 13 to link their Scoutbook account to Google.
Additional Background - Family Link restrictions prohibit changing the age to 13+.