My 6yr old has issues with expressive and receptive language. When will that possibly start to resolve? Some progress, but slowgoing

Workup necessary. Language disorders (expressive and receptive are the most common) are among the most common learning problems in children (and adults too). Check with your pediatrician and your school's child study team. Be sure hearing is normal. Checking for many causes of learning problems is what your pediatrician is there for.