Personally, I think the Spanish Football Association will allocate a Europa League place to last season's King's Cup champion. After last season, he played for La Liga in the Europa League, ranking fifth to seventh in the league. Bilbao was outside the European war zone, but failed to qualify for the Europa League because he entered the final (especially the opponent Real Sociedad has already qualified for the Europa League). It is reasonable to compensate the King's Cup champion for the Europa League quota this season.
In fact, according to the league and cup situation this season, Athletic Bilbao has reached the final again, and the opponent is Barcelona, which has basically won the Champions League. Bilbao will play in the Europa League next season, regardless of winning or losing the final.
Real Sociedad is currently ranked fifth in the league. If it can maintain its current ranking, it can also participate in the Europa League.
This is unprecedented in the history of the five major leagues.