Since upgrading to 2024120900, there's a "Do Not Show Again" option on the notification for WiFi calls, but it is completely ignored. Tapping on it does nothing.
This warning annoys me since years, it happens only when using Vodafone Germany and WiFi calling is enabled.
I wanted to add a screenshot here, but using "Add an image" only gives me the possibility to link to an external image. Anyway, it's described in the Google Issue Tracker.