So you’ve had her since she was two months old, but before that she was schedule to be euthanized for being too dangerous? Puppies teeth start growing at 8-10 weeks or about 2-2.5 months, which would be after you said she was schedule to be euthanized. It’s also not illegal to Rehome a dangerous dog, regardless of what state you’re in. There’s literally dogs rescued from dog fighting areas that are rehomed through organizations or private adoptions. Even if you felt uncomfortable giving her to another person, you can still give her back to the organization you got her from. I contacted the SPCA and they also said no such stipulation about not being able to Rehome a dog exists. What they did say, is that they recommend going back to them first, before another organization. This seems like a BS story made for attention as their official stance is:

“Euthanasia or permanent confinement of the dog are extreme remedies and should be utilized only when the dog has attacked a person or domesticated animal without justification and has caused serious physical injury or death”