FWIW, I dont believe tension in the lips when playing trumpet is analogous to guitar.
My understanding is that reducing aperture (changing Shape) is what determines pitch.
While tension is needed outside of the aperture in the muscles surrounding the aperture,the tissue that interacts with the air column must be left free to vibrate as fast as possible to achieve the pitches above the staff / High C.
Tension in the lips themselves doesn’t help us, it hurts our ability. The tension surrounding the aperture is to keep the aperture small as the air is released thru the aperture. Like the hose /water analogy.