I have a website which contains a list of all businesses in my region. They all have a profile page that can include a Facebook or website URL.
I added rel="nofollow noopener" to all external links but it seems this is not working and Google still indexes the redirector. When I search this in Google:
site:www.mijngistel.be I still see Facebook links etc.
I didn't set this in the beginning of the website but I did this change a couple months ago.
What is wrong?