It's not just for games. FEX-EMU is used here alongside Wine/Proton to run games but it'll also run the x64 version of other things. There's other layers like Box64 that do the same thing. For Linux, a lot of the software traditionally found in repos already has an ARM version and it's not as necessary. On Windows on ARM sometimes the only way to get an ARM native version is to run the Linux version under WSL.

Windows on ARM has allowed running x86 code from launch with Windows 10 and x64 code since Windows 11.