Maybe we just disagree about what "common" and "uncommon" mean in this context.
What actual percentage of the 100,000+ public companies around the world trade on another exchange?
Most of the DAX 30 in Germany don't even trade on another exchange. Adidas doesn't. BMW doesn't. Siemens doesn't (they were delisted by the NYSE in 2014.) Does any of the DAX 30 trade on an exchange outside of Germany?
As far as I can tell, only 8 companies in Germany trade on another exchange but maybe my source is wrong.
Almost no ADRs trade on US exchanges. There are over 100,000 public companies in the world and the NYSE has only 506 non-US issuers. I'd call that pretty uncommon.
I said it was pretty uncommon, not that people couldn't name individual, rare examples.