Ok I checked the yeta mirror could indeed turn into dust release because it can turn into any nature but if it does tht the caster being onooki controls the molecules so there for he could take the yeta mirror from its user that being itachi
I've checked tht is only loop hole with yeta mirror because while it can change to anything it cannot give te user the chakra affinities to control the substance it changed to
So yes while onooki cannot nesscairly destroy yeta mirror he can control it to either become nothing at all (it would prob des pawn at some time) or try to gain control over it
Fact here
"Dust Release (塵遁, Jinton; Viz "Particle Style") is an advanced nature kekkei tōta, an advanced version of kekkei genkai, which is created through simultaneous use of the earth, wind, and fire natures. The techniques of this nature initially form as a small three-dimensional object (e.g. a cube, a cone, etc.) composed of chakra that forms between the user's hands. When the technique is released, the form expands and surrounds the target. This nature allows the user to manipulate molecules, giving them the ability to disintegrate anything on a molecular level within the boundaries of the three-dimensional form."
So there for there is a loop hole into any yeta mirror theory