They finally replaced the compressor and the A/C is now A ok!
The dealership troubleshooting skills has been so poor it took over 2 months to get the car A/C repaired but I am enjoying my '18 Leaf again finally!
In the end they replaced the evaporator case, repaired a wire harness that they may have damaged when they replaced the evap, replaced the o ring expansion valve that they damaged while performing repair and finally replaced the compressor.
After each replacement which took about a week to perform, they would tell me the car was fixed and was ready for pickup! Last and final visit they kept the car an extra 3 days after repair to test the repair was actually effective!
The car A/C had its refrigerant recharged 4 times over the course of these visits!