If you did the warranty through the outfit you bought the frame from then I’d expect them to do whatever labour was required free of charge. If you did it through another dealer then I’d expect them to charge you for the work if the distributor refused to ereimburse them the costs involved, which they probably would do because they’d argue that you should have gone back to the outfit you bought it from.
If you bought from CRC or similar, then you are probably just going to get the bare minimum because that’s why you bought from them in the first place. ie they operate on bare minimum prices AND COSTS.