I think CFU and DBV would be payload restricted out of SOU
SOU is usually OK for any IT flight up to about 2 hours such as IBZ BCN PMI VCE - over that we start to see restrictions with A320/321 or 738 737max i am pretty sure
that makes the operation costly
although saying that BACF lift EMB190 out of LCY to mykonos skiathos and Santorini