How can I activate or deactivate the 'Similar products' teaser on product pages?

[rlpenluft]

Hi,

on one of our product pages we have a "Similar products" teaser at the bottom:

https://alpenluft.org/products/fernbedienung-fur-rauch-hitzemelder-funkvernetzt

However, I cannot find where to activate/deactivate this teaser in the backend of the product concerned.

Where can I activate/deactivate this teaser?