DS9 s2e26 The Jem’Hadar

The cop-out explanation from Memory Alpha:

Only one Vorta was demonstrated using telekinesis: Eris. As the DS9 writing staff put more thought into the Vorta following their initial appearance in “The Jem’Hadar”, telekinesis was discarded and deemed a misstep that the writing team hoped viewers would forget. (Star Trek: Deep Space Nine Companion, p. 155) Ronald D. Moore stated, “Our internal rationale has been that Eris was given this ability for a specific purpose by the Founders (and maybe several other Vorta along with her) and that it is not a normal part of the Vorta ‘recipe’ in the Dominion.” (AOL chat, 1998) However, on an earlier occasion, Moore stated that other Vorta “presumably” had the ability, but no situations in which it would manifest had come up. (AOL chat, 1998)