As of now, there is no direct evidence to suggest that magnetic fields are influenced by dark matter. Dark matter is believed to interact primarily through gravity, while magnetic fields are associated with the electromagnetic force.
However, there are some theoretical models that suggest that dark matter may have some effect on magnetic fields indirectly. For example, some models propose that the magnetic fields in galaxies may be generated by cosmic rays produced in the annihilation or decay of dark matter particles. In this scenario, the magnetic fields would be indirectly influenced by the presence of dark matter.
Despite these theoretical models, the current understanding is that magnetic fields are primarily influenced by the distribution of matter, including visible matter such as stars and gas, rather than dark matter. Observations of magnetic fields in galaxies have shown that they are correlated with the distribution of visible matter, such as the spiral arms and gas clouds, rather than with the dark matter halo.
Therefore, while there are some theoretical proposals that suggest a possible indirect influence of dark matter on magnetic fields, there is currently no direct evidence to support this idea.