Since Release of the RS2 the extension set is not available.
DJI Store  - sold out (since 6 months)
I have ordered it last November - no Vendor in Europe is able to deliver.

DJI: please comment on this.

https://www.studiosport.fr/kit-de-base-dextension-pour-dji-rs-2-a20784.html

Thx for the information. Is there area special reason why there is still such a huge delivery bottleneck? I want to purchase the article in a German speaking country.

They are very serious (it’s a famous shop) they speak English and sell worldwide.