Comparison of the relationship between the isotropic gamma-ray energy (Eγ, iso) distribution and the redshift (z) of GRB 221009A (red square) with other TeV-detected GRBs listed in Table 2. The background consists (blue circles) of a distribution of E_γ, iso for a sample of GRBs with a measured z, taken from Minaev & Pozanenko (2020). The upper X-axis represents the age of the universe in giga years, corresponding to the redshift values indicated on the lower X-axis.