In my opinion, most Dermatologists would not perform a chemical peel at the same appointment as Fraxel laser therapy. Generally speaking, the risks would outweigh the benefits for most patients, and significant damage to your skin could result.
I would not recommend getting a chemical peel and Fraxel done at the same time. There is no need or benefit from doing these two procedures together and could result in unnecessary injury to the skin, which could result in adverse effects.