Microsoft released the PC Health Check app to check your computer’s hardware and tell you if it is compatible with Windows 11. Microsoft’s first version of the app did not tell users what hardware was failing tests, leading to even more confusion. An open-source tool named WhyNotWin11 provides a far greater amount of detail, letting you know exactly what hardware is incompatible. It gives detailed information about what particular hardware category is failing so that you can resolve it with new hardware or by enabling settings on your motherboard.
Source: https://www.bleepingcomputer.com/news/microsoft/whynotwin11-is-a-better-replacement-for-windows-11s-pc-health-check/