I thin k th epolitican should stand over it and allow both Juan Carlos and Sofia to be present, not at the Main stadium but in the audience like Sofia was when Felipe took the oath.
What would they do when Juan Carlos suddenly passes away? Bury him in a private ceremony without a proper funeral for a former King
Spain has no government, the current government is in office and Sánchez is trying to form a government with a group of republicans, nationalists and independence supporters, including the Catalans who demand an amnesty for all the crimes they committed. These groups constantly use the Crown as a political weapon to defend their interests and are not even going to attend the events.
In this situation, which looked quite difficult for the Monarchy, what the Borbones should do is be quiet and stand aside, because they have already left the situation difficult enough for Felipe who has had to deal with all of his family's garbage and its consequences.
Juan Carlos is egocentric and is surrounded by a toxic environment. Instead of acting with humility, assuming his mistakes and being discreet, he puts on a circus every time he travels to Spain and all of this wears out the Crown unnecessarily. At the time the Count of Barcelona had to keep his pride, renounce his rights and occupy a secondary position for the good of the institution, Juan Carlos is not demonstrating the dignity of his father. His father was dismissed with royal honors and respected by everyone.
The Princess of Asturias, with her sweet beauty and sense of responsibility, is gaining popular affection and the events in which she stars have audiences on television that the Royal Family has not seen for years. The family's obligation was to accept the political situation, bow their heads and accompany Leonor with dignity... that would have been a point in their favor and they would have won points in the eyes of public opinion. But once again, some are wanting to boycott everything because they crave prominence, and in the eyes of public opinion they are going to fall even more because people will not forgive them for spoiling Leonor's day.