Just get a receiver that supports Dolby Headphone. These can be obtained cheaply and easily on eBay. E.g.:
https://www.ebay.co.uk/c/97513263
Although I think later Marantz models don't support Dolby Headphone (maybe they didn't want to pay the licensing).
This will take 7.1 LPCM and virtualise it. It will do a much better job than any of the gaming products using optical.
I used to have an NR1601 before I bought a Realiser (which uses HDMI as well but is, of course, a lot pricier...) Much better than Turtle Beach, Astro etc. The only downside is use of desk space.
Believe me, I’m well aware of the discontinued receivers with Dolby Headphone. They still count as rare in my book. I also have a Realiser (A16, in before +$4k).