Repeating invoices
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Set repeating invoices to Approve, not "Approve for sending". We then send each one with sections, the same as one you approve yourself.
With "Approve for sending", Xero emails the invoice itself, without sections, so we leave it and your overview says so. To switch: in Xero, open Sales → Invoices → the Repeating tab, open the repeating invoice, choose Approve and save. The next invoice it creates is sent by us.