AION 2 controller support: NC says controller play works but full support is still being evaluated. Steam Deck and Linux support are not officially confirmed for Global launch.
The safest wording before launch is: gamepad play is possible, but full controller support is not yet promised. That leaves open details such as complete menu navigation, controller glyph coverage, remapping and edge-case UI screens.
Global is currently being developed exclusively for PC platforms. No PS5/Xbox Global launch has been announced, and the Global FAQ explicitly says the current Global version is PC-only rather than mobile.
AION 2 official Steam pre-release FAQ — platform and controller status