Most games here run on a toaster. It is not that the typical dev here even has the ability to test low power systems or different operating system or has an understanding what to test for. They use an engine. Unless that engine is something like Unreal, the answer to most system requirements is: if your rig can run the browser you used to download the game, your rig probably can run the game.
Or in other words, if asked, I imagine the typical answer to the question of minimum system requirements would be: how should I know? I just downloaded that engine and made my game in it and clicked the export button.
In yet other words, if they can't run the itch app, chances are, that many games also will not run.