is any objects in a Lagrange orbit around venus?

Answer 1

Not yet. None that is known atleast. It is possible that there are some tiny asteroids there, like the trojans in jupiters lagrange points, but if there are they would be very small, like pebbles, and quite difficult to see.

Answer 2

Nothing big enough to be seen with any telescopes made to date. Nor anything large enough to cause any gravitational perturbations we can detect. So it is highly unlikely to be anything significant.