I uploaded about 12 episodes to a tv series about a day ago. I added everything, including date aired and all crew. The episodes are live now, but it does not show the air date.
Different data types are processed in different streams by different Data Managers. It is quite common for various items to appear at different times.
The Data Processing Times page shows that Release Dates has been fully processed through November 10, and since items submitted with a New page (including New Episode) are not released for approval until that Page is approved, if your Episode pages did not appear before then, they may still be in the queue awaiting approval.