Why doesn't dnf traditional duel field add experience?

I guess your duel field is a low-level duel field. There are only two possibilities without experience. First, your duel level is higher than that of duel field (level 5-1 duel field, you have no experience before the second stage). Second, your opponent's level has been reduced to the level where you can gain experience. 1 -5 duel field, if your opponent hits 1 from the first stage and you are in the second stage, you have no experience. I guess you are the first one, and the grade is too high. Change to a senior duel field.