there are write ups by the University of Washington and Stanford University - It has been reported.
they show an inverse relationship between smoking and Covid-19 outcome. No links to the studies, no specifics, no data, zip, nada.
interestingly - the studies aren't available to the causal browser or even referenced on the institutions web sites.
also interesting - the FAQs on WHO and several other websites carefully avoid the question by deflecting to variations of 'Smoking Bad'. I did find a peer reviewed Chinese study - published by the same jack-a's who published another study that was so bogus that NE-JAMA had to retract it and apologize - people are still making pointed accusations that the Chinese paid for its publication.
I'm confused. but i'm not a medical doc either.