Because there is no official version, you cannot download FIFA 21 from the Xbox Games Store or find a physical disc for this console. Official Alternatives and Legacy Games
: Many online links claiming to offer a "FIFA 21 Xbox 360 Download" are often unreliable or unofficial files that require modified console hardware (JTAG/RGH) to run. Supported Platforms for FIFA 21 Xbox 360 Fifa 21 Download
It is important to clarify that was never officially released for the Xbox 360 Because there is no official version, you cannot