Dear Jetphotos
What do I have to adjust for 'undersharpen (soft)' as rejection reason. I have no idea what to improve. Is there a description? What does it mean actually? Not sharp? To less contrast?

The picture are for example here:
https://www.jetphotos.com/viewqueued_b.php?id=6889297
https://www.jetphotos.com/viewqueued_b.php?id=6889265
https://www.jetphotos.com/viewqueued_b.php?id=6889285

Thanks a lot for advice.

John