There is no way of knowing what any individual thinks. No one can answer that question but the individual you are referring to.
Would a non-custodial father be concerned or choose not to get involved if his long estranged and recently found teenage child told him about abuse&instability in their life with their mother?
It could go either way, things to consider, does he want the child to live with him or not? Does he want this child affecting his life? If he doesn't want the child living with him, does he think that the child would be better off in care? And how would these actions affect him and the child emotionally.
All involved should have a meeting(s) if possible with skilled professional(s) to discuss child(ren), mothers, fathers and others in the child(ren) lives. Call a Women's and Children's Shelter, Goodwill and Salvation Army for referrals.
It's hard to know what going on with the information you have provided.
If he found you, most likely.
If you found him, why you two were estranged might make a difference: But I would expect him to still care about you and your circumstances.
Love always delivers when it can.