Export Object after promise is resolved

I am using “load” and “OBJloader” from loaders.gl/core and loaders.gl/obj to load a mesh to export it as a const so other module can use it, currently I am using this

export const myMesh = Object.freez({
     mesh : load(path_to_obj_file,OBJLoader),
     origin: [1.4,0,2.2],
     dimensions: [2,2,2],
     scale: 1
)}

but then I find out that I can calculate the origin and dimensions from the obj file itself without the need to put them manually (I used to calculate them form meshlab), and I can do it from the load function itself

load(path_to_obj_file,OBJLoader).then((obj)=>{
console.log(obj.schema.metadata.get["boundingBox"]
}

boundingBox would be like that [[-1.4,-1,-2],[0.6,1,-0.2]] (numbers are not accurate at all).
and I can calculate origin and dims from the boundingBox.

my question is, how can I export the const myMesh now? since I have promise, also when we write:

mesh : load(path_to_obj_file,OBJLoader) 

could that cause a problem since load returns a promise ? (currently it is working correctly)

I tried:

export const loadMyMesh = load(path_to_obje_file,OBJLoader).then((obj) =>{
     const myMesh = Object.freez({
     mesh: obj,
     origin: calculateOrigin(obj),
     dimensions: claculateDim(obj),
     scale: 1
    });
  return myMesh
})

where calculateOrigin and calculateDim are functions used to get the boundingbox and calculate the origin and the dims, but that didn’t work.

so any solution ?