I had also faced same issue, you need to register graybox OPC automation dll file after which you will be ablle to communicate with any OPC DA server
Download DLL from here.
Open command line as Administrator and then change path to Folder that contains DLL and then write
regsvr32 "name of dll"
For OPC DA try to use lower versions of python like below 3.10 also you can explore OpenOPC-DA