Bio dad "not in picture"

Yep, his rights will need to be terminated in order for an adoption to occur, and yes, they will likely wait until they TPR on bm. If they know who bd is, they will seek out relatives, at least in my area. My dd's bd is unknown, and it was a nailbiter right up to adoption finalization. We were all worried that bm would name a bd at the last minute, and perhaps he or his parents or siblings would want her. For my daughter, they published notices to find bd, and TPR'd him with bm.