'has yet revealed' is correct and usable in written English.
You can use this phrase when there is something that has not been revealed or disclosed yet. For example: The true cause of the fire still has yet to be revealed.
Since then excavations have completely changed the picture, although none has yet revealed a settlement earlier than about 8000 bce.
No one has yet revealed who might replace its longtime star, Steve Carell, as the office manager.
Although there is another issue: Cannes audiences have loved the film, yet nobody has yet revealed that there's a huge political statement at the film's heart, one that will make the film horrid and unpalatable to many viewers.
Canada's CBC News reported the other day that none of the major cable and satellite companies has yet revealed how much they'll charge when pick-and-pay programming is introduced in three weeks.
No Carcinus population in the native range has yet revealed genetic evidence of hybridization; even crabs collected from the Palmones estuary were found in a study separate from that noted above to be unambiguosly C. maenas by genetic criteria [29].
None of these modifier studies has yet revealed a specific mechanism by which the genetic variation has its apparent effects, which will be required to use these findings as a guide to rational therapeutic development.
No studies have yet revealed the impact of the economic crisis on the skill structure of the labour market, that is, whether more high-skilled than low-skilled jobs have been lost, or vice versa.
Elsewhere a few administrative cock-ups led to scuffles, but no evidence of systematic malpractice has yet been revealed.
Dalton was described as "cooperative," and authorities said the shootings were "intentional," though no motive has yet been revealed.
