Here and now the laws are changed. Adoptees have rights to find their biological information, it's pretty clean and secure. I fell into a completely different category because I am old :)
Where I grew up there was a story about a man that died of heart failure at age 38. His son grew up to also die at 38 from heart failure. The son never knew he was adopted. I do not know the validity of that story, except for two men that died very early about 25 years apart.
One more thing. When I took my special needs sister to lunch to celebrate the end of quarantine for her from Chemo not Covid she told me that's she's going to check out her mother. I just happen to know that her file at the adoption agency contains extensive biological information and a letter from her mother. We know a part of her story, but she's now decided she wants to know the rest. Our mother encouraged us all to find out, she'd be incredibly happy for me if she were here.