On Twitter, Wooding reports that the second book is about 70% complete and now on hold, as another top secret project has taken precedence. Like many SFF authors, Wooding isn't a full-time novelist but has a day-job, in his case as a scriptwriter for film, TV and video game projects. Initial work on the Ember Blade sequel was slowed by another top secret project that turned out to be Assassin's Creed: Valhalla, where Wooding provided writing and dialogue for various characters.
With the book in a reasonably advanced stage of completion, it hopefully won't take too long to complete once Wooding is able to resume work on it. In the meantime, we have a bit of a wait to find out what happens with both the book and also what the top secret project he's working on is.