My Kia Sorento 2014 has frequent / intermittent AC smell, the authorized workshop changed evaproator 2 times in 1 month, still the smell returns intermittently.
Me thinks your evaporator drain is clogged. The service center should have caught that problem.
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Might be worthwhile to remove the blower cage, see what’s going on in there as well. If both blower cage & evap drain checks-out ok, whatever is causing the odor problem could be in the air ducts. Likely a mold growing on the inside surface. Ask shop if there is a chemical treatment available. For example a chemical anti-fungal aerosol is drawn into the hvac air intake ports. Could work, and much easier than disassembling the entire hvac duct-work.
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Try changing out the cabin air filter.
Tester
I really question that shop. Evaporator drain and cabin filter were two obvious steps. No indication in the original post why the evaporator was replaced.