The paper presents the detection of a supernova (SN) associated with the brightest gamma-ray burst (GRB) ever observed, GRB 221009A, using observations from the James Webb Space Telescope (JWST). The SN, identified as a SN1998bw-like event, is well described by a power-law afterglow with no evidence of r-process emission. The SN produced a modest amount of 56Ni (approximately 0.09 solar masses), indicating that it is not an unusually bright GRB-SN. The host galaxy of GRB 221009A is characterized by a very low metallicity of approximately 0.12 solar masses and strong H$_2$ emission, suggesting recent star formation and environmental factors responsible for the extreme energetics of the GRB. The study highlights the need for systematic surveys of late-time IR spectra of LGRB supernovae to better understand the role of r-process nucleosynthesis in GRB progenitors.The paper presents the detection of a supernova (SN) associated with the brightest gamma-ray burst (GRB) ever observed, GRB 221009A, using observations from the James Webb Space Telescope (JWST). The SN, identified as a SN1998bw-like event, is well described by a power-law afterglow with no evidence of r-process emission. The SN produced a modest amount of 56Ni (approximately 0.09 solar masses), indicating that it is not an unusually bright GRB-SN. The host galaxy of GRB 221009A is characterized by a very low metallicity of approximately 0.12 solar masses and strong H$_2$ emission, suggesting recent star formation and environmental factors responsible for the extreme energetics of the GRB. The study highlights the need for systematic surveys of late-time IR spectra of LGRB supernovae to better understand the role of r-process nucleosynthesis in GRB progenitors.