It's confirmed Nihilus didn't use TK on a spectacular level though per this quote which says it was mostly his connection to the ship which held it together. This feat isn't above average lol.
"Nihilus: Some poetic license was taken with the Ravager – I mostly wanted Nihilus to have a ghost ship in keeping with his personality. It wouldn’t immediately fall apart without Nihilus, but his presence there and his ties to it make minor changes and upkeeps to its function and hull that keep it intact – if barely. When killed, the ship would slowly begin to fall apart into wreckage, although it’s not held together by any sort of super Telekinesis."
Q: In the Knights of the Old Republic Campaign Guide, under the Sith Battleship description it states that Exar Kun recovered his ship the ‘Corsair’ in the same way Darth Nihilus recovered the ‘Ravager’ on Malachor V. Does this mean that Exar Kun summoned the ship via the Force from the depths of the Massassi Temple of Sacrifice?Peña: That said, looking over the text, it appears to me that a direct analogy with the Ravager and that your interpretation is essentially correct. (Another example, though in reverse, is Emperor Palpatine using the Force to bury the Lusankya, in plain sight, beneath the surface of the planet Coruscant.)