Thank you for your answer. I've found that in Knowage 7.1, if I share a cockpit inside a folder executable by a user with a public role, it is available to all the users without the need to login. It's said here:
https://knowage.readthedocs.io/en/latest/admin/README/index.html#copy-link-to-share-analysis
Hello, someone managed to make it work in chrome?