The Ready State Virtual Mobility Coach is like having a virtual Kelly Starrett in your pocket.
A high arch is the opposite of having a flat foot so it is addressed differently.
This is an abnormally high medial longitudinal arch.
Depending on the type of pes cavus dictates how it is addressed.
Episode 54: Pinchy Ankles and Weak Feet
Episode 337: Long Ruck Feet Or Ultra Marathon Feet?
Episode 07: Bro, Your Navicular Bone Dropped
There are several episodes that address the ankle.
You need to look up/downstream of the ankle to identify the cause. Where you see the issue may not be where the cause originates.
Ankle Positional Fault Fix: Jill Miller Style
Squat Quick Test: Is it your Ankles or Hips?
Episode 313: Improving Ankle Range, Super Friend Addition
Episode 285: Sliding Surfaces; Ankle Range of Motion Case Study Part 1
Episode 285: Sliding Surfaces; Ankle Range of Motion Case Study Part 2