I want to set up parental controls on my son's iPhone, but he has to use WiFi calling in our house as phone reception is so poor. I added parental controls previously, but the allocated time gets used

Via Deco app, under HomeCare, Parental Controls, Child, Insights, I've noticed Wi-Fi calling showing the child using 4.0 hours usage (eventually blocking the 4 hour "Time Control" set for all of their