In my opinion you need to explain your question in more detail. Usually "populate" is a term referring to configuration, not to the transfer of data.
Do you have a PC-based HMI already on your system ? What is the purpose or function of your OPC-UA based interface to the controller ?
There are hardware appliances that can act as OPC-UA Servers, and software Servers as well. If you already have OPC DA software on your system there may be DA/UA bridge functions that are appropriate.
The more context and detail you can provide, the better answers folks can give.