Jammyray

My VA service connected disability was finally approved after 20 years of long battle and get the letter from the BVA and it was granted the introduction page it is stated that the issue of entitlement to a total disability rating based on individual unemployability (TDIU) due to service connected has been raised by the record, but has not been adjudicated by the Agency of Origin(AOJ. Therefore, the board does not have jurisdiction over it and it is referred to the AOJ 100 % disable by the SSS since 1997 and that is part of my evidence that is wht my connected disability was granted. My question is why I was not rated TDIU 100% disability by the AOJ. Do I have to apply for TDIU separate or what Please help.