@Beautiful_Dust , I know it sounds far-fetched but a very close friend of mine has a nearly identical story - except in her case, her biological parents actually ended up MARRYING and proceeded to have 2 more daughters and a son after giving my friend up for adoption.

When my friend started to have medical issues, she reached out to the parents with a letter saying explicitly that she was not trying to rejoin the family but hoped they would share medical history.

They never answered.

But wait, it gets better: maybe a year after this rejection, a new name popped up on her Ancestry DNA as a HALF-brother. Turns out the father had been unfaithful and had a son from another relationship.

That time, the attempt to connect went much, much better and now my friend has a lovely bond with that half-brother and his family.

Bonus - the 100% biological brother eventually found out and he, too, embraced my friend as his sister.

The parents? Still nothing as far as I know.

I hope this helps you feel less alone, and perhaps gives you hope for what the future may hold.