Filing i130 doesn’t help other than wasting hundreds of dollars. He will probably become a GC holder in a year or two through his pending asylum application if approved. Under i130, as said, he will need to wait another 12-14 years to be able to change status and become a GC holder and if he accrues any unlawful presence during that time, his AOS will be denied. Pending or approved i130 is of no use if his asylum is rejected. So just hope his asylum gets approved and don’t waste money on i130 unless he plans to go back to Nepal and wait 12-14 years for visa if his asylum is rejected.