The last number of solar cycles have been getting progressively weaker. The current one is bucking the trend by being stronger.
Or are you saying that the CO2 content has been decreasing since the 70s, except for a sudden increase in the last few years?
https://www.spaceweatherlive.com/en/solar-activity/solar-cyc...
Satellites (some capable of observing the Sun) are a thing. And have been for quite some time.