Can 2 yr old molars breaking thru gums cause her to have a gland noticeable on the same side of teeth coming out. Bk of neck by ear dr said it normal?

Often. Teething can cause inflammation which can lead to enlargement of the neck glands. If this does not resolve in a few weeks, have your doctor recheck it. If it is associated with other symptoms, such as stiff neck, fever, poor eating, steady growth in size, redness of the overlying skin, or any other concerning symptoms, have your doctor recheck it to make sure it is not related to another problem.
Have it rechecked. There might be accompanying inflammation or infection in or around that tooth, area. How long has the gland been swollen? Any pain or fever? Please have the area rechecked by a dentist if it persists longer.