Is it possible to externalize addressable?

Hello everyone.

When dynamically loading 3D models on Unity, you can make them addressable and load them into Unity.

What I want to do is to make various 3D models prepared by users addressable using some external EXE or external conversion tool before importing them into Unity’s EXE, and then import that data.

I also tried batch processing to make Unity addressable, but the problem is that Unity needs to be installed on the computer itself, so I would like to only give the user the Unity EXE tool that we developed to use it on their computer.

Are there any online services that convert PNGs to ICO images and do addressable conversion?

It’s common for Unity to manage and distribute its own elements, but is it possible to load them dynamically?