Above you can read the Google translated note from Sony Japan. As you know an early batch of A7IV cameras already shipped out in Europe while our US readers will have to wait at leas til December 30.
Sony A7IV preorders (Use those affiliated links to support my work. Thanks!):
In the USA at BHphoto. Amazon. Adorama. FocusCamera. BuyDig.
In Europe at Fotokoch DE. Calumet DE. Foto Erhardt DE. Park UK. Wex UK. Amazon DE. Amazon UK. Amazon IT. Amazon ES. Amazon NL.