Why are the PnL values in the Trading lists empty?
This could be a result of two things:
1.Missing Trading Snapshot
2.Trading Profile settings

The "Unrealized P&L", "Realized P&L”, and "Total P&L” fields are driven and populated in the lists based on the last trading snapshot.
Therefore, if a Trading Snapshot is run everyday - it is expected that these values are populated.
However, if the snapshot has run successfully and these fields still remain blank, then the next step would be to check the Trading Profile that the Snapshot runs on -as some Trades might get excluded from the Snapshot based on the selected checkboxes.
e.g. The counterparty in the contract is Internal and the checkbox "Exclude Internal Trade“
If the issue is with the Trading Profile, it will be easier to spot as some Trades will have these fields populated whereas in others they will be blank.