There are three different heads with different UVmaps.
1 is present in _Character_RigifyExample.blend
2 is present in _HeadTemplate.fbx that belongs to _Assets/Characters/Basebody/Basebody/Basebody_Male_Head01.xob
3 the faces that appear in ArmA Reforger are not any of the two previous ones...
They are the _Assets/Characters/Heads/Head_White_02/Data/Head_White_02BCR.edds (for example) that belong to _Assets/Characters/Heads/Heads/Head_White_02/Head_White02.xob
Where can I get this face in .FBX to be able to work correctly in ArmA Reforger faces and textures?
Unfortunately it is rather unlikely to get other heads for retexturing but perhaps in future, it might be possible to change UV mapping of Head_Template.fbx to match Head_xx_xx variants.
There are three different heads with different UVmaps.
1 is present in _Character_RigifyExample.blend 2 is present in _HeadTemplate.fbx that belongs to _Assets/Characters/Basebody/Basebody/Basebody_Male_Head01.xob
3 the faces that appear in ArmA Reforger are not any of the two previous ones... They are the _Assets/Characters/Heads/Head_White_02/Data/Head_White_02BCR.edds (for example) that belong to _Assets/Characters/Heads/Heads/Head_White_02/Head_White02.xob
Where can I get this face in .FBX to be able to work correctly in ArmA Reforger faces and textures?
Example images: https://imgur.com/a/X7JHRgW