I think we should have an own sub-forum for keyboard layouts, as every few days new topics are added.
Summary:
As a result of a poll, UK and DE was added, but has been removed since. So not even the top voted seem to make economic sense for Purism at this point in time.
International keyboard poll
Keyboard layout poll
But you can still get a DE or UK keyboard, if you don’t require the latest. They are on sale.