Good to hear you are seeing improvements.
Keep working with your hip capsule if this is an area that needs attention. Improving this will continue to improve your squat.
Sounds like you aren’t hitting the cause of the restrictions on your ankle which is why it isn’t improving.
Have you addressed anything up/down stream of the ankle?
Free Your Heel, Free Your Mind
Ankle Positional Fault Fix: Jill Miller Style
Episode 285: Sliding Surfaces; Ankle Range of Motion Case Study Part 1
Episode 285: Sliding Surfaces; Ankle Range of Motion Case Study Part 2
Pro Episode # 44: The Last 25% of Your Ankle Restriction (Snatches and Pistols here we come!)
Squat Quick Test: Is it your Ankles or Hips?
Episode 303: Going Around The Ankle at MBSC