https://wccftech.com/xbox-series-s-can-double-xbox-one-games-frame-rates-with-only-a-few-code-changes/

The Xbox Series S will not be able to play Xbox One games with Xbox One X enhancements, but it may be able to double frame rates of older games.

Speaking with Digital Foundry, Series S System Architect Andrew Gooseen revealed how developers can improve how X1 games run on the new console by changing three lines of code.