It's both your data and that person's data.

(copied from my earlier comment) I think it's very close to C-579/21 which was about audit logs. In that one CJEU ruled that audit logs are personal data of you and the person who performed the action. They did allow censoring the person's name in that case (and exact timestamp), but given that in this case LI is selling this information to same person then "protecting others" rings pretty hollow.

Agree, I don't fully understand the argument that this would be the owning profiles data, and not either Linkedin's or the viewer's. Would you be entitled to search query data from Google because your website is in some query results, and Google has to provide you that metadata for free?

I believe that the case here is different. That would be true, say, for your substack page. But in this case, your "profile" is more than just a web page, it contains personal information, which albeit public, is your property according to the law. Therefore any interaction with it falls under article 15. Personally I would find it fantastic if LinkedIn is forced to make this feature available to all users. I can't see it but as a win for consumers and a loss for inducing payment through extraction of interrelational value.