My cat went missing over a year ago and I just found out he was surrendered him to a shelter without telling me. I need advice on what I can do.

A little over a year ago, my cat, Tyrion, suddenly went missing after I moved into with some family. I had no idea what happened to him. I searched, asked around, checked local groups, but he was just… gone. I never got any answers and it’s been something that’s weighed heavily on me ever since. Fast forward to now, I recently had a conversation with a family member who admitted that they actually took my cat to a shelter to be put up for adoption. Their reasoning at the time was that he was urinating everywhere and fighting with other cats in the house. The part that makes this worse is that we later found out the urinating wasn’t even caused by my cat. It was from one of their cats, not mine. So now I’m sitting here realizing that my cat didn’t just disappear. I don’t know which shelter he was taken to yet, but I’m trying to find out. I’m posting here to ask if anyone has experience with this kind of situation or knows what steps I can take to try and track him down. Are shelters able to give any information if I can identify him? He was a stray that I took in from a different state. No adoption records at the start. Is there any kind of record I can request? If he was adopted out, is there any possible way to be notified or connected? I know it’s been over a year, but I’m hoping there’s still some kind of trail I can follow. Any advice on what I can do or where I should start would mean a lot. Thank you.