This is an issue with Sony not Wildcard.
Sony has an incredibly strict policy on downloadable mods/third-party software on its platform.
It was hard enough for Bethesda to incorporate mods in Skyrim and Fallout 4, and they’re an established studio.
Mods on Ark PS4 will 99% most-likely not come in our lifetime. Ever.
The only way for mods to come through Ark is through becoming part of the core game files such as Prim+. This is another difficult process that would have a better chance of becoming part of Ark 2 (if there ever is one) as opposed to Ark: Survival Evolved.