We already show instrument approach feathers in the German chart where the approach is outside of controlled airspace. I believe the new DFS charts are introducing a few of these feathers where the approach ends in controlled airspace but is partially outside, on a trial basis to see how they are received, before making a decision about whether to include more in next year's chart.
We do not currently plan to copy the trial feathers this year, but we will keep an eye on how they're received.