How to confirm the reality of the existence of an electric field?

The reality of the existence of an electric field is confirmed by the fact that electrically charged bodies interact with each other (attract or repel) at some distance from each other.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.