No, you cannot lock an iPhone this way.

iOS is the most locked-down phone ever built, and the only person it locks out is you.

Android has a role called device owner. Assign it during setup and the holder has administrative authority over the phone, permanently, from the outside.

iOS has an equivalent, called supervision, and Apple keeps it for companies and schools that own the hardware. As the owner of your own iPhone you cannot hand yourself into it.

So Screen Time is what you get, and Screen Time gives you the passcode. Every restriction on that phone is one tap and one Face ID away.

The 4 workarounds people suggest.

• An MDM profile from a serviceremovable in Settings, and you are the one in Settings
• A DNS or VPN filterone toggle off, and the profile removes with it
• A friend holding the Screen Time passcodefails on the first night they are asleep
• A supervised iPhone through a paid serviceclosest of the 4, and still one reset from clean, because the final key stays with the Apple ID you hold

I spent years in those workarounds. Each one held for a week or two and then folded the same way.

Why I refuse iPhone owners outright.

I could sell you a weaker version and take your money. It would fail in week 2 and you would read that as another personal failure.

It is not one. The device gave you nothing to hand over. That is a hardware and policy fact, not a character fact.

What to do instead.

A used Android that supports enterprise provisioning costs less than 2 months of the apps you are trying to escape. Almost every modern Android does.

Back it up, factory reset it, scan one QR code, choose what dies, and set the delay. Then the Feeds are behind a waiting period you cannot shorten.