In doubles there are less opportunities for you to go side-on and turn to hit your shot since everything is fast. Sometimes you can get into a situation where your opponent is lifting high and that's when you can use the rotation more - but still, one thing in doubles to remember is you actually put your full weight into the rotation because you don't want your momentum to carry you forward, since you're not covering the net on the next shot. You need to keep your balance for multiple consecutive smashes. The only exception is when you're rotating with your partner and you want to move forward with your attack.
In singles it could be that you're too slow, or your shot quality is not high enough so your opponent plays better shots and you end up with less time, but you will have more opportunities to do the full rotation but also move forward with your momentum. This again does require you to hit a good quality shot because if it's poor, your opponent could lift your smash over your head for example and you're still moving forwards with your momentum, which creates a lot of pressure on you for the next shot.