I have just looked at 3 products at random.
Over 15 sellers on each one. All of the sellers except 1 are one of the following
American with no VAT number (about 35%)
American with a UK VAT number (about 45%)
Italian with an Italian VAT number
UK with a UK VAT number
By my reckoning all of the American sellers will be pulled. Even if these sellers start the process to register for German VAT they will struggle to get their number in 2 weeks.
It is going to have an astonishing impact on Amazon.de.