Kiln dried pine is safe for hamster to chew on - most hamster won’t chew on wood unless it in the form of natural twigs. The willow stick bunches from p@h have been favourite chew toys with my current Syrian Pumpkin as well as my past hamster. But they much prefer to chew on Whimzee dog chew than most chews designed for hamsters.
I also don’t recommend harvesting forage for hamsters as layou nevertheless know what might have been on the plant - instead I prefer to use the Burgess mountain forage herb mix to scatter around my hamsters cage and sprout hamster safe seed to give her instead (like in this thread
Sprouts three ways!)