Although the TicWatch E2 was unveiled a few months ago, it still has to reach the market. However, Mobvoi is showing it off at CES next to the TicWatch S2, and both should become available for purchase in the future. Sadly, there are no official launch dates or prices to talk about yet.
https://www.notebookcheck.net/Mobvoi-shows-the-TicWatch-S2-and-the-TicWatch-E2-at-CES-no-launch-date-yet.393151.0.html