Shape keys problem

I am new to using blender. I am using MPFB extension to create human model. I am working on a web-based project using the three.js library. I want to observe the changes in the avatar by entering body measurements, just like in blender and makehuman application. I can manipulate specific areas such as shoulder width, hip size, arm length, but I cannot manipulate age, gender, weight etc. I made the necessary codes and python connections for this,I roughly know which areas to change in the phenotype parameters and how, but many morph targets cannot be found in the relevant changes. but I think the error is related to shape keys. When I try to export the avatar in (.glb) format, I cannot access all morph targets. How can I export from blender with all shape keys or do you have any suggestions for this project? Thanks!