Unlike CO2 the influence of methane on atmospheric warming (in W/m²) has not changed during the last 50 years. I appears there is almost zero impact on climate

Unlike CO2 the influence of methane on atmospheric warming (in W/m²) has not changed during the last 50 years. I appears there is almost zero impact on climate change by man/woman-made methane. Am I a denier by pointing that out?