Are all the immortals in Lingxiao Hall sealed by Jiang Ziya?

No, Jiang Ziya is deified because there are 365 positive gods in the sky. Of course, there are already immortals. Jiang Ziya is another part of the immortal. After Jiang Ziya became a god, many other immortals appeared in later generations. At the end of the story, Mr. Dan Tianfang specifically mentioned that the deity of Jiang Ziya was only as of Shang Dynasty, a series of immortals such as Zhenwu Emperor had not yet been born, and so on. ...

"Six Spring and Autumn Annals" can be said to be a sequel to "Romance of Gods", which is about the Spring and Autumn Period. There are many immortals besides the list of gods. Zhenwu Emperor appeared in the Spring and Autumn Period of the Silver (Gold) Box, in which Sun Bin was named as the Heavenly Patrol Imperial History and so on.

The legend of later generations is that there are more and more kinds of immortals.