Is it safe to do radio frequency of the face while I'm under laser hair removal treatment for upper lips?

Yes, you can have radiofrequency treatments during your laser hair removal timeframe. These treatments can even be performed on the same day. See an expert. Best, Dr. Emer

Generally speaking, there should be no contraindication to having both treatments within a close time frame.  Radiofrequency usually won't offer much in terms of result in your upper lip.  A consultation would be required for more definitive answers. 

It should be fine to do both treatments at the same time. However, it might depend upon the type of hair removal device you are using so that there is no outward irritation to the skin. I would discuss your concerns with your treating physician.