The Targaryen Civil War was set up by Rhaenyra (Harry Collett) and her sons Jacaerys (Elliot Grihault) after learning of Aegon II's (Tom-Glynn Carney)'s) coronation. Here is what we know so far about Jace's fate.
What happened to Lucerys in ...
What Happened To Jacaerys Velaryon in the House of the Dragon? Is he still alive? Jaces Fate
Read more in the source