I was hoping to get a refund confirmation email or see it added to the flight booking when logging into LH as proof of the refund is in process; 3 days and still nothing.
If it's any consolation to you, I voluntarily cancelled two refundable N-fare tickets 13 days ago. One was refunded within 4-5 days (without any separate refund notice), the other is still pending a refund. I can only speculate that LH is processing these in some kind of priority queue. Both my tickets were for travel in early April.