I have seen a few tutorials around utilizing the MediaUpload component from below.
But none of them demonstrate it with the default gallery functionality that is common pre-Gutenberg. For example the ability to select multiple images and then be taken to a second screen where you can order and caption them. See attachments if further info is needed.
There is the multiple attribute which can be set to "true" or "add" but it doesn't toggle the second screen for ordering the items or captioning them.