A toast with IRN BRU to your bio-heritage. My father's half brother (older) was put out for adoption when his mom died in childbirth. My dad finally made contact with his half brother. I've added his half brother and my half-cousins to the family tree in Ancestry. I have another cousin, the son of my mother's brother. My uncle wasn't made aware of the existence of his son until his son was 20 years old. I finally met my cousin Steve. We are both fans of skating. Off to the rink to do what we both love. Steve retained the surname of his adoptive father, but did get to meet his bio-dad.
The dad who does the task of raising the child is "dad" and deserves the appropriate love and appreciation for taking on the responsibility. Knowing your bio-dad is useful for knowing biological/ethnic heritage and any traits/deficits that come with the genetic lineage.
I’m glad you had a happy ending.
I wish I could have got to know my bio dad’s family. One of his nieces sent me some pix so I got to see what he, his mom and pop and siblings looked like.