create an enhancement after PR is released in ME54N for line item

I need to create an enhancement after PR is released for line item / each release level.

Details : i need to update some tables once the PR line item is released .in ME54N.

so searching for some exits or enhancements where i can do my coding .

I have checked for BADI's which can trigger after the PR is released .

but couldn't find the exact one .

Can you guide me on this .