How to Send All Invoice attachments to Xero

How to Send All Invoice attachments to Xero

Hi, we are new to Zahara.
I have noticed that only the first document attached to an Approved Invoice is being sent to Xero.
However, as our staff can add multiple receipts to an Expense Claim or Credit Card Reimbursement, this is causing issues as the multiple files have to be recognised as missing and then transferred to Xero manually.

Is there a way, other than requesting the staff compile all receipts onto a single PDF, to have all documents attached to an Invoice sent to Xero on Approval?

Is there also a way to have a popup view of additional documents without having to download them to our hard drive when approving them?

Thanks for your help
Jennifer