Those are different overexposed foreground stars. You can tell by the diffraction spikes that they are overexposed point source objects, i.e., they are stars in our galaxy. The diffraction spikes are caused by the JWST rather than by the stars themselves. The image shown in the question was the first JWST deep field view image. The goal of this image was to capture images of gravitationally lensed remote galaxies. This inevitably meant that any foreground stars in the image would be overexposed.
The stars in the referenced image all look the same (pure white and similar diffraction spikes) because they are overexposed point sources of light. The overexposure results in every channel being saturated, and hence white. The diffraction spikes are a consequence of overexposure, the near point source nature of stars, and the way the JWST was constructed. In particular, the diffraction spikes in a JWST image are a consequence of the segmented mirrors used by the JWST and the vanes that support the secondary mirror. To look at deep field views such as this you need to ignore those overexposed foreground objects; these overexposed objects are an undesirable but unavoidable consequence of the long exposure times needed to see the very remote background galaxies. The objects of interest in images such as this are the smeared out, gravitationally-lensed, low-intensity background objects.
There are at least 22 objects in that image that are duplicates as a result of gravitational lensing; see the image below and the references below. The image portrays several of the remote galaxies that are duplicated due to gravitational lensing. However, the ones circled in the question are not duplicates.
phys.org, "Improved model for the mass distribution of galaxy cluster SMACS J0723.3−7327 based on Webb telescope image"
Caminha, G. B., et al. "First JWST observations of a gravitational lens: Mass model from new multiple images with near-infrared observations of SMACS J0723. 3-7327." Astronomy and Astrophysics 666 (2022): L9.