Not an audiophile by any means so bear with me here. Is there a device that can take an Optical S/PDIF input and a Coaxial S/PDIF input and output both sources at the same time? The closest thing I've found searching on amazon is this but you can only choose to output one of the inputs at a time, so you have to switch between the sources.

Another type of device that came up in my searches is HDMI audio extractors. They seem to have lots of I/O but seems to only be able to take HDMI as input (which makes sense since its an HDMI audio extractor) and I dont even know if they can output multiple inputs at the same time. I feel like what I'm asking for goes against the rules of audio lol, but would appreciate some help!