If you had certifications, they are still on your account, but privacy settings might prevent them from showing up on your profile.
How long ago did you complete freeCodeCamp challenges? If it was before significant curriculum rewrites, then the new challenges won’t be marked as completed because they are different than the ones you did. It looks like you were active on the forum about 4 years ago, which would have been an older version of the Responsive Web Design courses.