Isn't that what the setting "adds based on data from partners" are for? (guessing what it will be named in English) I have set it to not allow and have never seen an add from any of the 8 companies who have uploaded my contact data
No. Here's what the info box says about that existing privacy feature:
"Products that are provided by the Facebook Companies, including WhatsApp and Oculus, as well as Facebook Products like Facebook, Instagram and Messenger."
That has nothing to do with non-Facebook companies. It's something else entirely.
Maybe different settings for different regions, probably connected to GDPR. Directly translated the 3 info boxes I get say: Ads based on data from partners, ads based on your activity on Facebook Companies products (seems to be the one you have), and Ads based on your social activities (for instance pages you like). The 2 first can be set to not allow and the last to none.
That first one is "Data from partners includes your use of partners' websites and apps and certain offline interactions with them, such as purchases."
This offline interaction data is different from contact data. The latter doesn't involve any "partnership." It's a completely different part of Facebook ads.
