Oh yes, I need to update.@Feek did you try to dig out any possible domain names to whitelist for wifi calling to explicitly allow or just disabled the list that you found causing it?
That sounds like an iPhone setting. Does this still happen when not connected to the WiFi?For example, her mail app was showing the warning about network privacy settings blocking content and this is because the mask.icloud.com and mask-h2.icloud.com domains were being blocked, even though no block lists are attached to the “No block” group. Am I missing a setting somewhere?