We do not have plans to support it, specially the ‘clasic’ OPC version. This technology strongly relies on legacy Microsoft technologies that are simply not available on the iOS platform.
However if you talk about OPC UA, we could consider it in the future. Unfortunately, so far licensing terms are too expensive for us to just add it in our product, so most likely this will be offered as an add on with additional costs for users. Ultimately, the future availability of this will depend on user demand.