The Wikipedia article on wormholes claims:
Researchers have some observational evidence for wormholes, and the equations of the theory of general relativity have valid solutions that contain wormholes.
But there doesn't seem to be any details on the 'observational evidence' in the article. Also, other Physics SE questions (e.g., How do wormholes work?) mention in passing that
... we have no observational evidence for 'wormholes'. They are theorised solutions to general relativity equations.
So do we have some observational evidence for wormholes, or not?