Environmental and server load factors can mean that there is a delay in data reaching Financials and often it will appear after a time.
Having confirmed that the transaction is neither posted, nor batched, please check the datahub information from the Utilities menu in the System module.
Data received and posted will show as a status of 1, and so anything not processed will have a different value (eg 4).
Identify any anomalies and check the message text. This can be copied into a text file and often problems can be identified by comparing it to a successful posting.
Some common reasons are:
No Detail information - the text will contain "DetailLines":[] with nothing between the square brackets.
You may need to raise this with the users processing the imported data in the source application.