If Path to the Peak is in play, can I use Liepard V's "Hidden Claw" Ability when I play it from my hand onto my Bench?
No, Liepard V is considered in play by the time Hidden Claw activates, so it won't work due to Path to the Peak.
Source: Chilling Reign FAQ; TPCi Rules Team (2021-06-17)

Relevant cards

Note: All applicable cards may not be listed below.
SWSH6_104
SWSH6_104
SWSH6_148
SWSH6_148