Robotics is very much split into research users and industry. In industrial automation you buy a device (say a sensor or programmable logic controller) that comes with a few supported protocols. Typically a field-bus for realtime communication. And for the fancy ones also OPC UA (ISO 62541).

I don't know automation vendors that sell devices with ROS-support out of the box. With the use of Python it must be hard to get ROS safety-certified.

OPC UA is like a merge of ROS (channels for PubSub communication) and "CORBA done right" (an object-model that can be transparently interacted with over the network).

Full transparency, I maintain open62541, an open source implementation of OPC UA.