Is Tino Chrupalla perceived as the AfD leader? I'm just interested that he is polled and Meuthen isn't.
Chrupalla has been elected lead candidate for the 2021 federal elections (together with Alice Weidel).
Not that Chrupalla is a particularly interesting figure; he's the archetypical compromise candidate. So, few people would actually consider him the AfD leader. But neither Meuthen (still in Brussels) nor Wundrak (too 'liberal') or any other prominent contender had a majority to become lead candidate.
AfD's leadership has always interested me somewhat as they've never really seemed to have one obvious, well-known leader. This makes them quite different to other rightwing populist outfits who often coalesce around one leader. For example Lega has Salvini, RN has Le Pen, UKIP had Farage, Chega has Ventura, Fidesz has Orban, PVV has Wilders, FPO had Haider, SD has Akesson and so on. I know in the past AfD had Lucke and Petry but they weren't as well known as Salvini or Le Pen. I wonder if it is in order to avoid comparison with you-know-who.