Sorry. Not at 7-yrs old.
A 7-yr old can't legally sign a contract or otherwise act as an adult.
You need to reach your majority -- which was 21(?) at the time -- to sign a contract. Or renounce your citizenship.
That’s a false narrative to protect a usurper. A minor can sign a contract, but it is unenforceable by the the contractor (i.e. the contractor cannot repossess property or sue to enforce rights against the minor).
So, many people believe minor’s cannot enter into a contract. They can and they do. But the contractor is exposed to loss if the minor does not choose to honor the contract.
In the case of a US citizenship renouncement, a minor must appear before US official and formally revoke their renouncement and swear an oath of allegiance to the US. Once this is done, the minor recovers their US citizenship as a naturalized citizen and not a Natural born citizen. Natural born citizens do not have to swear an oath of allegiance their country because the allegiance is considered to be naturally occurring.