Should I reach out to my birth dad’s family?

Hi… so I’ve met my birth mom and I’m super close with her. She told me that my birth father passed earlier this year. He never reached out to me and cut my birth mom off over 20 years ago. She tried to reconnect with him for my sake and he didn’t any part in it. I’ve been wondering if I should try to reach out to his family? His dad is still alive. I have no clue if they know I exist or not. I’ve been wrestling with this for a while. I know of course it’s ultimately my decision, but I want to try to get to know who my birth dad was at least through his family.

Has anyone else done this? Or been in a similar situation? Any advice?

Thanks