If you know someone who sews, you could probably have a couple made that APPEAR to be pleated, but are just strips across, with openings at each strip, or one in the middle. You might be able to achieve this yourself, with scissors and a store-bought mask, but look for the style with horizontal pleats.
Every time I’ve put slits in a disposable mask, I can see the slits. It doesn’t matter if I’ve made them horizontal or vertical.