This will happen even more when Android 13 is released. There is an extra permission for having notifications shown for every app separately. I know for sure I will disable notifications for pretty much every app except email and messengers.
There are alao plenty of us who just have notifications set to vibration mode without any sound full-time. The only phone alert in my case that makes sound is the alarm. Unless i put my phone on some hard surface or literally next to the bed, there is no way i will hear vibrating notifications, even when awake.
In general, I found vibration-only to be pretty much the default for a lot of people I know (though I am sharply aware that this is just anecdata and doesn't say much about the real state of things). I tried googling whether there was some breakdown of notification vibration vs sound smartphone users, but, sadly, couldn't find much.