I don't believe you're going to find an architect to identify any subsurface issues (which I believe you have). I'm not an expert in the field but I have some experience. If the wall is cracking inward and the tiles are falling in, you are likely experiencing some sort of structural problem.
There can be many factors that effect this including but not limited to: ground shift, soil expansion/contraction, roots encroaching on the pool wall, water collection, etc.
Age of the pool and time of year it was installed can also play a big part in this. If it's relatively new I would call whomever installed it.
Typically the wall of the pool is quite thick so I would think there is some sort of strong pressure on the wall.
That said, I don't think you'll necessarily get much out of an architect more than a bill. You're better off getting a pool company with construction expertise to come out IMO.
I would suggest Mobley or Sunshine Fun. These guys build more pools and have for longer than anyone else. A pool tech is not going to be able to help you so you need to be specific that it's a structural issue.
If you'd like to chat more feel free! I hope you have a positive outcome