Do you have the domain updater service enabled? The expiration date should show up after that service runs. With that being said, since that service runs once a day, there may be some time when there's no internal expiration date.
We do have plans for a future release to better support transfers.
If the expiration date is still not showing after the domain updater service has been run, please open a support ticket at
https://www.clientexec.com/members/index.php?fuse=support&controller=ticket&view=submitticket so we can take a look at why this isn't working for you.