Make sure every object in blender has a scale of 1, if you are getting that issue in static meshes it is likely you scaled them up as objects within blender instead of scaling the mesh in edit mode. I’ve made many tests to import from blender to unreal without having to do many touchups if any at all, and for importing objects the issue usually was scale of the object itself.
Importing from blender isnt as straight forward as it is from maya, create a dummy scene in blender and export it in many ways and see what errors you get, then analyze what option you have in blender that might have created the issue, delete from unreal and reimport. Its a lot of trial and error, but it can be done a 1:1 export-import.