To unlock this device, enter your family link parental access code. - - - - - - (6 digit code) I tried provide parental access code through my both gmail accounts (Might she has used my second gmail account or etc), nothing working.

I've created a child Google account by Family Link App then I remove it on parents' Android device. Then my child Android device was locked and need Family Link access code to unlock. But the child account was removed from Family group already, so

You can also use a parent access code to unlock your child's device. You get an access code in the Family Link or on the web. This number will not be sent via email or SMS. Enter this one-time use only number into the child's device before the cod