Xbox not sensing 5.1 audio

360BNT Kinivo HDMI Switch with Audio Extractor (3 Port, Toslink Optical Audio Out ,4K 60Hz, High Speed-18Gbps, SPDIF, IR Remote).
I recently purchased this and have connected my Xbox One via HDMI. I have the TOSlink from the Kinivo going to my surround system but the Xbox is claiming my “TV” only supports stereo…
In this case the “TV” is a projector… Does the Xbox still get it’s detected audio capabilities from the TV when using the toslink? How would I work around this?