Some Backwards compatible games stutter with 120hz enabled on Series X|S

Well no the xbox series s isn't capable of 4k 120hz video games it's not even capable of 4k 60hz

That's the series x

The best the series s can do is 1440p

The reason why you aren't getting any signal is because the series s isn't capable of it

Only in streaming not gaming

This is the offical.ms.papers on series s

https://www.xbox.com/en-CA/consoles/xbox-series-s

As noted it's only capable of 120hz on 1440p in games and 4,k 120hz on streaming

Not a lot of games support 4k 120hz even on xbox series x

Even on backwards compatibility games it's a max of 60fps with yakuza running at 900 frames

You gotta remember it's upscaled not native

Hence the lesser space requirements for series s

Xbox backwards compatibility is currently paused for the moment due to the focus of the Xbox Series S & X release. So it may be some time for the game to become backwards compatible if it ever does.

The Series S/X is the new Xbox console. One games will work on a Series S/X because of backwards compatibility, but it doesn't work the other way around. Some games have been made for both, so you would need to make sure to buy a game compatible with the
One.

The game is not listed on the backward compatible games for the Series X|S consoles. So the answer is no, the dongle will not work on the Series X.

No. One games will work on a Series S/X since they are backwards compatible, but Series S/X games will not work on a One. You would need to use the One version.