Yes, you can share documents from the LOS with the borrower in the POS.
Find the document you wish to share, then toggle the "Share to POS" on the document you wish to share with the borrower.
If you want to unshare a document, you can always toggle this off again.
Once a document is shared with the borrower, the borrower can access the document from their POS.
Note: The Majority of documents generated in the LOS will not be shared with the borrower by default. The only document that will automatically be shared will be the pre-approval letter.