The BUILD IT Act would require the federal government to transfer any border wall materials that were contracted for but have not been used, per border states like Arizona and Texas, for construction of barriers and walls. States would have to certify those materials are being used to build a border barrier.
The Trump administration built more than 400 miles of border wall, but the project was not completed by the time the Biden administration came into office. President Biden immediately ordered a halt on further wall construction.