It looks like you are not the only one who would like to do that (https://blenderartists.org/t/blender-2-8-collections-to-maya-groups/1141401)
It's not supported by Blender/Maya so I would have to write a custom solution to make that work. For example by converting all collections to empty objects before the export and restoring the collections after the exports. But that could end up in a more complex tasks for big Blender scenes so it's probably not a quick thing to do.
It looks like you are not the only one who would like to do that (https://blenderartists.org/t/blender-2-8-collections-to-maya-groups/1141401)
It's not supported by Blender/Maya so I would have to write a custom solution to make that work. For example by converting all collections to empty objects before the export and restoring the collections after the exports. But that could end up in a more complex tasks for big Blender scenes so it's probably not a quick thing to do.