That’s almost always where the program snags. Renovation money isn’t released at possession: it waits until the work is done and verified. So you have to be able to pay the contractor up front, or have one willing to wait.
Many buyers take possession, then pay for renovations on a line of credit or a card, at a notably higher rate. Purchase plus improvements isn’t offered by every lender and the rules vary: eligible amounts, types of work, deadlines. I go to the ones who offer it and confirm the eligible work list before you commit to any contractor.