In the 10th Dimension, aside from mental thoughts and consciousness, everything else was either frozen in time or in suspended animation. The Ultralisk, even with its powerful psychic power, as well as sheer size and strength, could not do anything other than drift aimlessly. Its unevolved mind was unable to comprehend anything that was going on.
Jiang Fei was able to move and control the strings of reality. However, he was cut off from every help he had: the scope, the support system 0541, and all matter of digital products. As long as it was comprised of matter, it was frozen.