Reading wikipedia, there isnt even complete proof this was drawn by Leonardo da Vinci.
"Salvator Mundi is a painting of
Christ as
Salvator Mundi (Savior of the World), which has been attributed by most scholars as a work by
Leonardo da Vinci since its rediscovery in 2005"
There are also some who question the attribution, and point out certain aspects of the painting.
[23][24] For example, Michael Daley, the director of
ArtWatchUK, raised doubts on the authenticity of the painting. He noted that there is practically no evidence that proves that Leonardo was ever involved in painting a
Salvator Mundi subject; thus disputing the important argument in favor of attributing the painting to Leonardo, namely that the painting contains
pentimenti and for that reason has to be attributed to Leonardo himself.
Jacques Franck, a Paris-based art historian and Leonardo specialist, who reviewed the piece out of the frame multiple times, stated: "The composition doesn't come from Leonardo, he preferred twisted movement. It's a good studio work with a little Leonardo at best."