Path of Exile officially supports Windows, Xbox, and PlayStation. There is an official macOS client available, although - as of June 2025's Patch 3.26 - the application is not yet ARM-native, and thus continues to be dependent upon Apple's Rosetta 2 software.
There has never been an official game client released for Linux - however, Grinding Gear Games has periodically made changes in patches to address issues encountered when playing Path of Exile on Linux through WINE or its derivatives (example).
GGG not officially supporting Linux diminishes the capacity for community-sponsored Linux support efforts.
Below are some questions and answers clarifying the current scope of Linux support on this website.
An example of a Linux page is the System Information article.
The equivalent main article for this is divided into a dichotomy - Windows users are directed towards creating a DxDiag, and macOS users are asked to generate a System Report. Neither of these are at all suitable for Linux.
Another example of a page in the Linux section is MTR ON LINUX PAGE LINK GOES HERE.