Lower bound on IGMF derived from GRB 221009A (red line) compared to existing bounds from γ-ray, radio, CMB, and UHECR observations and predictions of the cosmological evolution models. The CMB upper bounds are from Planck (Planck Collaboration XIX 2016) and from the analysis of Jedamzik & Saveliev (2019). UHECR upper bound is from Neronov et al. (2023). MAGIC lower bound is from Acciari et al. (2023). Green shaded area shows the range of predictions for the endpoints of cosmological evolution of primordial magnetic fields. BJ04 is from Banerjee & Jedamzik (2004) and HS22 is from Hosking & Schekochihin (2023).