https://www.bbc.com/future/article/20220321-what-happened-to-the-worlds-ozone-hole

Today, the ozone hole still exists, forming every year over Antarctica in the spring. It closes up again over the summer as stratospheric air from lower latitudes is mixed in, patching it up until the following spring when the cycle begins again. But
there’s evidence it’s starting to disappear – and recover more or less as expected, says Solomon. Based on scientific assessments, the ozone layer is expected to return to pre-1980 levels around the middle of the century. Healing is slow because of
the long lifespan of ozone-depleting molecules. Some persist in the atmosphere for 50 to 150 years before decaying.

There are also activities whose impact we don't yet fully understand but might pose risks, like - rocket launches - and sulfate geo-engineering – the idea we can stave off the worse effects of global warming by pumping aerosol into the stratosphere to
cool the climate, by causing sunlight to be reflected off those aerosol particles.

Yes, rocket launches and Air plains dump nasty chemicals in the upper atmosphere too!

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