We do run a network of websites. For demonstration, I'll make up numbers.

We have one main health related website and 20 supporting websites. Each website hosted on the same dedicated server, same IP address. We are linking from supporting websites to the main website. Links are 99% from articles, but we also have a link in the Resources section on each website.

From time to time, we do link from main website to a health problem specific website, which is often one of our supporting websites, but not exclusively.

Is there a chance, Google will evaluate our network of websites as a PBN and ban it? I don't see manual actions on these yet.