There is also a German pretty active forum on velomobiles, where You can post in English or maybe use deepl):
www.velomobilforum.de
BTW: i own two velomobiles: an old GoOne 3 which i am trying to make more efficient, and a few months ago my Leiba Cargo (a two seated velomobile) finally arrived:
https://www.bassic.de/attachments/si...2-jpeg.693987/