Your “age‑eight abstract thinking” claim still imports a developmental threshold Paul never uses; Rom 1:20 and Rom 2:14–15 ground accountability in revelation possessed and conscience functioning, not in when a child can conceptualize God.Yes, both Paul and I ground moral accountability in revelation (Rom. 1:20) and conscience (Rom. 2:14-15), which occurs at about the age of eight and is called the mental stage of abstract thinking/understanding.
Your "precedes" and "later" is what some refer to as "parents representing God" and "awareness of God Himself".
Your “parents representing God” vs “awareness of God Himself” distinction is just a psychological gloss on the same assumption — that accountability begins only once cognition matures — but Paul treats conscience as morally operative before theological articulation, which means suppression begins with revelation, not with abstract reasoning.