In a lot of cases they won't warranty it unless it's actually dripping. In both cases (2020 Ram and 2021 Jeep) mine actually made drips off of the oil pan bolts as the oil ran down the engine.
Yes it's a big job. They've got to take off the engine cover, foam blocks, injector rail/lines, injectors, valve covers, etc. just to get down to where they can start working on the cover. Sometimes they run into issues like injectors that are frozen up in the head, etc. It's a real PITA that VM can't figure out how to seal up an engine from the factory. Typical Euro garbage quality.