The F-22's thrust vectoring is only effective in pitch and roll.
“It does sound strange, but 2D thrust vectoring is what the F-22 has, which means the nozzles only move up and down. The FAK FA will have 3D thrust vectoring, which means the nozzles will move up and down, as well as left to right. With the wide spacing of the engines, the thrust vectoring will be effective in pitch, roll, and yaw.
The F-22’s thrust vectoring is only effective in pitch and roll.”
I think they’re counting their dimensions incorrectly, and confusing them with aircraft controls. ‘Up and down’ (pitch) represent one dimension. It that’s what the F-22 has then it has 1D of thrust vectoring. ‘Side to side’ (yaw) is a control direction not a spatial dimension as such. Then there’s roll control, which would likely involve ducting some engine thrust out to the wingtips. Roll isn’t a spatial dimension either.