The deadline defined in Strings job stays there after importing the job into TMS.

The deadline is not moved to TMS, it stays just in Strings, so it is not visible on TMS side.

Use Case:
The deadline should be synced from Strings to TMS.
For a customer if their in-house translators’ KPIs are based on how many words each translator completes before the deadline, it would be best for them to check graphs on Analytics, but if the deadline information is not even synced into TMS, it’s hard to track such data.