It was an evolution, the myth and the sleigh was already there, the beard goes back hundreds of years. This page has a good overview of the image of Santa over the centuries:
https://publicdomainreview.org/collection/a-pictorial-histor...
https://publicdomainreview.org/collection/a-pictorial-histor...
I'd also like to see a hundred or more years old Lithuanian Santa version similar to the Unionist one.
This is not to dismiss your claim that this might be revisionist (I'm not sure), but your examples on Kazakhstan and Lithuania lack evidence.
Americans bastardized it to Santa Claus. As we do.
That no one in Germany knows about… https://youtu.be/Sb0qu_RjQ6I
``The cartoonist Thomas Nast established the bounds for Santa Claus' current look with an initial illustration in an 1863 issue of Harper's Weekly, as part of a large illustration titled "A Christmas Furlough".''