You can only adjust the haptic intensity there.
No options for any other vibration strength… which is what the OP wanted.

The vibration is the only thing that’s disappointed me so far with the 3a. But it’s quite a big disappointment.

All the glyph ringtones have basically no vibration… so you can’t feel it when people call and its in my pocket, so I’ll be forced to always use an audio ringtone.
Playing with the glyph composer yielded the same results with little to no vibration on anything I tried to create.

I downloaded some vibration apps to see what the phone was capable of…and I was unable to make it do a sustained vibration. The closest I could get was 100ms vibration with a 1ms pause that repeated. Or a 200ms vibrate with a 100ms pause that repeated…to give a decent pulsing vibration. It’s still not an amazingly strong vibration…but its better than every glyph ringtone.

All this is irrelevant to the problem anyway…as there is no way to set these vibration patterns to any kind of ringtone or notification. But it does show what’s potentially possible.

Nothing would need to add this to nothing OS as an option/feature.
I hope they read this and decide they need to.
IMO it’s desperately needed and tbh, if id known about this before I bought the phone… it would probably have been a deal breaker.

On the other side of it, the haptics can be too loud as well and make a popping sound, even when on silent mode. So if you truly want a silent phone you have to turn haptics off manually every time!
(The intensity can be modified for the keyboard haptics in the settings of gboard by changing the vibration intensity setting to 56ms in the gboard preferences, but this only affects the keyboard.)

    Having played around creating my own app…I’ve managed to get the phone to do a 5second continuous vibration, as well as a nice 3× 1 second burst pattern.
    I’ve just got to work out how to make it intercept calls and override the glyph’s vibrations with these pre-set patterns from the app. Apparently it should be possible. I’ll keep you updated and if it works I’ll upload it to the play store.

      Managed to get the app to prevent glyph ringtones from vibrating. And I managed to make the phone vibrate when making an outgoing call 😃 (Not what we want, but at least it shows the potential of being possible.)
      Whatsapp calls already override the glyph vibrations with a normal vibration pattern, so again this suggests what we want is possible. Just need to keep trying different things and hopefully incoming calls will eventually trigger the app properly.

      SUCCESS! I’ve found a workaround! 😁

      Still need to do some testing and additions…but I’ve made an app that does what we want!

      The app will have it’s own ringtones. When people call you, the phone vibrates in 1second long vibrations with a 1 second gap, repeating. Much easier to notice in the pocket and feels like a traditional smartphone’s vibration.

      I need to build the ringtones so the glyph lights flash properly and then I will figure out how to upload it all to the play store.
      (It will be free 😉;P) Might add a donation button somewhere tho… I’m not rich! 😂😂

        So it turns out, using any ringtone from ‘my sounds’ or ‘glyph composer’ will give u a standard smartphone style vibrate that is sufficient. So it doesn’t require an additional app.
        That’s probably the easiest thing to do, and it will function better than the vibration patterns from the glyph ringtones.
        (It’s just a bit confusing because the glyph ringtones will vibrate when you preview them, while all other ringtones just preview audio. But they do vibrate when people call 🙂