Pennsylvania

From the 2022-23 Digest:
Tracking Dogs
Dogs are not permitted to hunt big game, except for turkeys during
the fall. Leashed tracking dogs can be used to track a white-tailed
deer, bear or elk in recovery of an animal that has been legally
killed or wounded during any open season for deer, bear or elk.
No permit is required. The tracker cannot dispatch game that was
wounded and will be tagged by a hunter. The tracker must be properly
licensed for the animal being tracked. The tracker must abide
by hunting hours and wear the required amount of fluorescent
orange clothing for the season. All laws pertaining to the taking
of game apply. Trackers cannot charge for their services on state
game lands. Permission is needed before entering private property.

State Regulations: https://www.legis.state.pa.us/WU01/LI/LI/CT/HTM/34/00.023.083.000..HTM

United States:
Canada:

Green — Tracking allowed
Red — No Tracking allowed
Gray — Tracking allowed under certain circumstances or in certain areas of the state/province, but not all