The agricultural industry in the United States is slowly moving forward, but its growth is being ensnared by complex regulations ranging from securing an experimental license to grow, procurement of seed, testing for delta-9 THC content, just to name a few. Our (US) harvesting equipment is not strong enough to harvest hemp, especially hemp that is grown for the fiber and hurd. Consequently, most harvesting of hemp for CBD is being done by hand in the US.
Additionally, there is little to no infrastructure to decorticate the hemp and prepare it for what it is to become.
That being said, there is a company, Hempitecture, that has a line of equipment and training for the use of hempcrete. They also have hemp insulation batts. https://www.hempitecture.com/hempwool