The most reliable way to get Facebook on an x86 computer is through official channels that support this architecture natively. Facebook - Free download and install on Windows

Downloading Facebook for x86-based devices ensures compatibility for older computers, specific tablets, and Windows-based systems running Intel or AMD processors. While mobile devices often use ARM architecture, x86 architecture is the standard for most desktops and laptops, offering high performance and broad software compatibility. How to Download Facebook for x86 Windows (10/11)