DFW gets it quite often, but it is not guaranteed. Had DFW-DXB booked for 8/29 and was looking at the data quite deeply. Unfortunately, I have had to reschedule, but am pretty hopeful that one of EQH/EQL/EQP/EQM registrations could fly the inbound EK221 on 8/29.
DXB-MLE-DXB (EK658/659) is also another route which is not published, but gets the new F planes very frequently.