Do digambar monks go under erectile surgery
No. Digambar monks do not undergo elective or body-enhancing surgery.
In Digambar Jain discipline, a monk lives in complete renunciation, with non-attachment to the body and no desire to alter it for comfort, appearance, or sensual reasons. If there is a serious medical need, treatment may be considered for health reasons, but surgery for bodily enhancement would not align with monastic conduct.
If you meant a different kind of surgery, the exact meaning would matter, but the general Jain answer is: a Digambar monk does not seek such procedures for personal benefit.