bio family rights

If you find it can you pm me it?I know this can happen in step-parent adoptions or a death case...in order for a grandparent to go after grandparent rights they have to show a "parent like relationship" so the grounds sound right...but I've never heard of it in a tpr of both parents/and adoption by a non-relative...I've heard of it in a relative adoption situation. (sorry sw hat on my head :) )