The release of mod support for Fallout 4 on PS4 is still not ready according to Bethesda. While being available on Xbox One (and PC of course) for quite a while, a announcement made by Bethesda Game Studios confirmed that they're in talks with Sony about the issue, but the already late update remains without a release date.
"The process is still under evaluation. As soon as we learn more, we will share news", the studio said. An official delay for the mod Creation Kit feature came at the end of June due to the lack of sound file support and a storage limit capped at 900 MB on PS4.
For more on Fallout 4's latest paid-for DLC significance, check out our recent review of Far Harbor. Details regarding the upcoming Nuka World DLC can be found here.