The start.
I changed banks recently from bank A to bank B. As the family organiser I changed the default payment method to the new bank. That worked.
The problem
The family organiser default payment method is bank B which is correct.
My personal Apple ID inherited this change from the organiser to bank B which is correct.
My daughter’s (17y) Apple ID inherited this change from the organiser to bank B which is correct.
My son’s (19y) Apple ID did not inherit this change and is stuck on bank A which is incorrect.
My wife’s (age withheld for safety reasons) Apple ID did not inherit this change and is stuck on bank A which is incorrect.
Neither my son or my wife can change their payment methods at account.apple.com. That option is greyed out.
Calls to Apple support state the family organiser can only change that payment method as we have family sharing enabled.
Advised Apple that the family organiser had changed the payment method but it has not flowed to the two other family share members - they have no answer.
How do I resolve this please?
If I dissolve the family sharing group and create a new one, what will happen?