Separation Agreement not incorporated in Divorce?

Curiosity Question:

There were items agreed to in my separation agreement, such as a specific amount of child support and a few other items, that were not incorporated into my divorce decree. Are these items still enforceable?

Second, as it turns out, I was never legally married (bigamy) and have thought of filing a Prayer for Judgement to declare the marriage void. If I were to do that, where does that leave the Separation Agreement and/or Divorce Decree legally?

Are they also void or still legitimate since I thought I was legally married at the time the Separation Agreement was signed and the Divorce finalized?

I know the Custody Order would not be affected at all.

Yes, the contract is enforceable, even if the marriage is declared void.