For Windows 10 (version 20H1 and later), Microsoft recommends using the command-line tool D3DConfig.exe instead of the legacy UI-based DXCPL. DirectX Software Development Kit - Microsoft

: Users often set a "Feature level limit" (like 11_1 or 11_0) to trick the game into thinking the hardware is more advanced than it really is. The Reality: A Mixed Ending

DirectX Control Panel (dxcpl.exe): The Ultimate Guide to DirectX 11 Emulation

The DirectX 11 emulator provides several features, including: