Mildewed boards for fence

We’re having a fence put in and some of the boards are questionable. I’m sure they were likely the bottom of the pile of slats and it looks like some moisture got in. The boards are going to get stained eventually, so they might dry out now that there’s no moisture trapped in them. However, I’m in a semi-humid place and I’m unsure just how much they will dry. Any thoughts or suggestions? Today would be the day to make any requests or complaints to the builder.