I doubt a bit of UV on a vacuum does anything to a mite. They're kinda like spiders with a hard shell after all. One study [1] found you need one hour of hard UV-C exposure to kill most mites. That would probably also degrade the textiles and foam of your mattress, and probably does not even reach most mites/eggs in between threads and foam pores.

1 https://pmc.ncbi.nlm.nih.gov/articles/PMC3609379/