You can rest assured that
my phones are well managed. As well as phones can possibly be managed. Their volumes are set to zero, they are muted and their ringtones are explicity set to silence on top of that.
Disabling calls altogether can't be done. You bet I looked for that knob. Calls are literally baked into the OS. I even asked the phone company to turn off calling. Nope. So I have to live with constant useless annoying notifications that some bot is trying to call me whenever I'm actively using my phone. Welp. At least I managed to turn off voice mail. That was an especially horrible advertising vector.
Only reason I even have active phone numbers is WhatsApp. Technically, I only need SMS for the verification codes. Explaining that to the phone company is futile though.
Anyway, this only fixes part of the problem. Every other person in my life carries a phone with them. Older folks even have landlines. All those phones ring. A lot.
I don't generally make a habit of "configurating" other people's phones, for obvious reasons. I've tried convince them. It didn't work. They're OK with being routinely woken up by useless phone calls every single day because someone somewhere might one day need to call them on that phone to relay important news or something. It has a visible, measurable impact on their quality of life but they refuse to get rid of the phone. I think that's incredibly inhumane but it can't be helped.