Colonization begins within 24 to 48 hours once drywall reaches 20 percent moisture content

https://expressindustrytrainedcs.timeforchangecounselling.com/structural-drywall-faces-hidden-moisture-danger-long-after-initial-readings-appear-dry

No, drywall should not get wet at all—even minor moisture exposure poses a serious mold risk. Documented research shows that mold colonization begins within 24 to 48 hours once drywall moisture content reaches 20 percent, well below saturation