What you mean NO? I am enrolled in US university and I have everything why would they don’t let me enter?No US customs could refuse to let you into the US for misrepresentation because you are not intending to be a US student.
For Canada, same I am enrolled in classes in Canadian university and paid my domestic fee for one semester. I can show these proofs at PoE including my H&C reason. In addition, I can prove that I intend to live in canada from
Now on.