Total incoming sunlight each year based on sunspot observations since 1610. The Sun's brightness does change over time, but none of the observed changes are large enough to account for global warming. Data from NOAA NCEI.
Images of the Sun in filtered visible light on February 28, 2014 (left), near solar maximum, and on February 18, 2020 (right), near solar minimum. Overall, faculae generally outshine dimming caused by sunspots. Images from NASA SDO.