Yes, you tissue will adapt to the new positioning.
You are undoing the years of one positioning and re establishing a new motor pattern/positioning.

Have you watched these episodes?
Pro Episode #3 – The Flat Feet Solution

Rebuilding Your Feet With Brian MacKenzie
Rebuilding The Feet, Part 2

Rebuilding The Feet, Part 3

Episode 337: Long Ruck Feet Or Ultra Marathon Feet?

Are you doing any exercises to strengthen your feet?
There are some simple things you can do to strengthen your feet and it will assist in building your arch.

Have you had anyone take a look at your running technique?
I recommend video taping from a couple angles so you see exactly what is happening.

Run Drills are a key aspect. Starting each run session with drills helps prime the movement patterns.
6 week skill based run Progression
Week 1: Using Turnover
Week 2
Week 3
Week 4
Week 5 Using Turnover Cadence
Week 6 Restest