It is hard to give you an accurate assessment of the condition over the internet without personally reviewing the case but I will give you some helpful tips.
PDA refers to patent ductus arteriosus which is an abnormal connection between the aorta and the pulmonary artery. This is something that all of us have in utero but it disappears shortly after birth. It is not a hole inside the heart, so I am a little confused if your daughter has two different abnormalities.
You are right about questioning the role of surgery if your daughter is not symptomatic but there are often subtle parameters on echocardiography like enlargement of cardiac chambers or increase in the pressures which might indicate that the abnormal connection is causing problems with the working of the heart. Sometimes, the onset of symptoms is the last thing to develop and it might happen when lot of the changes are irreversible.
At this point, if you have questions, I would suggest that you seek second opinion from a pediatric cardiologist at a tertiary care center which has experience in treating these conditions.
You should certainly feel satisfied with the treatment options before actually embarking on them.
Hope that helps