I have applied for my brother I-130 (F4) back in 2015 and his case was approved, but the case with NVC waiting on Visa availability (likely another 7 years or so). He, and his wife, are eligible for U4U program. Would there be an issue with getting him approved for a parole and could this possibly hurt his immigration case in the future? For now, the intent would be to stay in the US for 2 years or so, and return to Ukraine if possible.