  High redshift blazars are among the most powerful non-explosive sources in
the Universe and play a crucial role in understanding the evolution of
relativistic jets. To understand these bright objects, we performed a detailed
investigation of the multiwavelength properties of 79 $\gamma$-ray blazars with
redshifts ranging from z = 2.0 to 2.5, using data from Fermi LAT, Swift
XRT/UVOT, and NuSTAR observations. In the $\gamma$-ray band, the spectral
analysis revealed a wide range of flux and photon indices, from $5.32 \times
10^{-10}$ to $3.40 \times 10^{-7}$ photons cm$^{-2}$ s$^{-1}$ and from 1.66 to
3.15, respectively, highlighting the diverse nature of these sources. The
detailed temporal analysis showed that flaring activities were observed in 31
sources. Sources such as 4C+71.07, PKS 1329-049, and 4C+01.02, demonstrated
significant increase in the $\gamma$-ray luminosity and flux variations,
reaching peak luminosity exceeding $10^{50}$ erg s$^{-1}$. The temporal
analysis extended to X-ray and optical/UV bands, showed clear flux changes in
some sources in different observations. The time-averaged properties of high
redshift blazars were derived through modeling the spectral energy
distributions with a one-zone leptonic scenario, assuming the emission region
is within the broad-line region (BLR) and the X-ray and $\gamma$-ray emissions
are due to inverse Compton scattering of synchrotron and BLR-reflected photons.
This modeling allowed us to constrain the emitting particle distribution,
estimate the magnetic field inside the jet, and evaluate the jet luminosity,
which is discussed in comparison with the disk luminosity derived from fitting
the excess in the UV band.
