I am in PA & familiar with some of this. A para can provide instruction but the teacher has to 1st instruct the para and then the para instructs the student. Right now, paras are in short supply and might not have the skill set to provide instruction. It really depends on the job description of the para. PA has wrap around/IBHS services. The RBTs that do this are only trained to redirect behavior and cannot do anything academic other than tell a student they need book X and page Y.
I think you need to rewrite the job description of the para in the IEP. You need someone who can, in the moment, chunk an assignment or provide instructional support. Your district might call this a teaching assistant or Paraprofessional/Instructional Assistant. Then you'll need to hope they can staff this for your child.