Facebook ads CTR nowadays?

I'm interested in how you experience the last 2 months after gdpr & apple update regarding Facebook ads?
I had with same audience TOF (exact targeting) purchase obj. drop in CTR from 2% to 0.8%

I can't believe this is just because pixel lacks data. In analytics, there is a drop in people coming to the website.

As far as I know, the CTR must be 1.5 or more to be effective for the article