Does the supererogatory prayer become invalid if the worshiper does not complete a single bowing or prostration in it?

If one performs the bowing (ruku') and prostration (sujud) in prayer sufficiently, along with ṭuma'nīnah (tranquility) and a single glorification (tasbih), their prayer is valid, even if they miss out on the full reward. The sufficient bowing is to bend such that one can touch their knees with their hands, along with ṭuma'nīnah. The sufficient prostration is performed on the seven limbs (forehead with the nose, both hands, both knees, both feet), along with ṭuma'nīnah. Ṭuma'nīnah is a pillar in bowing, standing erect from bowing, and prostration; it is the stillness whereby the joints settle in their places, even if the stillness is brief. Glorification in bowing and prostration is recommended according to the majority of scholars and obligatory once according to the Hanbalis.