Low and reused belly button. Is it normal to have a belly button so low? (Photo)

You did not post your before photos, and some people do have a low lying belly button. I would suggest discussing your concerns with your surgeon. He/she may have been trying to avoid a small vertical scar if the belly button was raised.

Thank you for your question and for sharing your history and pictures.
Looking at your picture, it's slightly challenging to discern precisely what was performed. Usually, your original belly button is detached and repositioned on the abdominal wall during a tummy tuck. This reuse of the original belly button is a common practice. It's relatively rare for plastic surgeons to create an entirely new belly button.
Regardless, the position and shape of your belly button can be revised. This revision can be done under local anesthesia. I suggest that the belly button be repositioned higher and reshaped to be more round.
An alternative option is to remove your belly button completely and have it tattooed by a medical-grade tattoo artist. While this is an easier procedure, it may not suit your aesthetic preferences.
Therefore, I would suggest considering a revision of umbilicoplasty or belly button surgery for repositioning and reshaping. I trust this helps answer your question regarding your low repositioned belly button and whether it's normal for it to be positioned so low.
Sincerely,
Dr. Katzen

An examination is needed to determine what occurred with the position of your belly button. I encourage you to return to your surgeon to discuss your concerns and possible options for reconstruction.