There were speculations about him that took on a life of their own, but had no basis in anything that was reported. The only fact I can remember about him is that he was someone who was in DC's life very briefly after her first marriage ended. I don't believe he is in the picture. Now that you mention it, I think you're right that it was reported that he is not in Moldova...I think it was said he is in Romania. I'll see if I can dig up anything official.
ETA: Just after a quick look, this article dated April 11, 2023, quotes the Cornelius Police Chief as saying that the birth father is in Moldova:
April 11. The search for Madalina Cojocari, who was last seen publicly Nov. 21, continues, [...]
www.corneliustoday.com
Madalina’s birth father is in Moldova and is not part of the investigation, Chief David Baucom said last month.