I have noticed a major issue with my iPhone. No matter what I try, I can't open a private tab in Safari. This is not good, as it means I have to manually clear my cookies (which is impractical) or disable them altogether (which breaks some sites).
As of today, I have an adult Apple ID, but my dad is the organiser of the Apple family.
I have tried disabling content restrictions in Screen Time, but it didn't do anything. Web Content is set to "unrestricted".
There is no switch or button in Settings > Safari.
I have no configuration profiles installed that could change this. All I have are a few root certificates, a bunch of fonts, and an APN cert.
Private mode is fully functional in third-party browsers, but they do not support extensions or userscripts and provide marginally worse fingerprinting protection.
Can anyone help?
As long as Screen Time is controlled by someone else on your iPhone, like a parent, then Private Tabs are disabled. They could also be disabled by a configuration profile (see Settings → General → VPN & Device Management)