The implants are not on the any PS4 version of Planteside 2. Also the devs are in the process of reworking the implant system so it's unlikely that implants will be added to PS4 until after they are reworked.
Wrelby said it'll be out when its done. There is still balancing work to be done on the iso-4 conversions as well as the implants themselves; so with that in mind I wouldn't expect the implants to be released until mid or late March at the earliest.
I think you may want to wait a bit, to reap the best results. IE when they finish the conversion rates, and maybe the ability for drops?
I hope implants come out on Ps4 Because if we don't get any content added to the game everyone gonna quit and adding a gun or nerfing and buffing guns is not adding content