If I understand England to any degree, the next step of those now disheartened by King Charles rejection of the Easter message will be to ask Prince William, what will HE do when his time comes to rule as King.
That will be one of their last hopes, that after King Charles succumbs to his cancer, Christianity will once again have official recognition an elevation through his eldest son.
Every king including Charles takes a Coronation Oath to uphold Christianity and the Established Church and the Protestant religion
“King” Charles is an oath-breaker and should be forced to abdicate.
I wouldn’t be too sure of that. William recently stated his faith is not traditional (some words to that effect). He’s agnostic at best.