If the user split an invoice into several lines for differentiation purpose, voucher transaction does not mirror the text invoice line. It would be great that voucher transaction can be generated regarding text invoice lines amount, invoice text and tax amount.

Norwegian companies use to send invoices electronically where text invoice lines works fine.
The issue is that the Voucher transaction does not update the description of invoice text so when the LedgerJournalTrans exported to database (BYOD) it is not clear enough.