I'm still wondering if they choose Unity only as initial partner and will allow other to integrate their 3rd parties engines by themself. Otherwise they would a

I'm still wondering if they choose Unity only as initial partner and will allow other to integrate their 3rd parties engines by themself. Otherwise they would alienated not only Unreal Engine game makers but also: - godot - bevy - flutter - qt since all those above render their own ui widgets - you need to integrate somehow this eye tracking to be able to select it.