In 2023, Murphy and colleagues reported the first direct evidence of how satellite re-entries are changing the composition of the stratosphere, based on data from a NASA WB-57 aircraft that flew from Alaska to altitudes of 19 kilometers. Using an onboard laser mass spectrometer, they found tiny droplets of sulfuric acid containing 20 different elements that likely came from satellites and rockets, as they were present in ratios that matched those of spacecraft alloys. The amounts of lithium, aluminum, copper, and lead all exceeded the estimated contributions from meteors.
Umm, yes it is.
https://www.science.org/content/article/burned-satellites-are-polluting-atmosphere