To progress further with the initial flashlight idea, controlling the flash directly appears to work fine in the following way.

#!/usr/bin/env bash

flashOff() {
	printf '%s' "0" > /sys/class/leds/led:torch_0/brightness
	printf '%s' "0" > /sys/class/leds/led:switch_0/brightness
}

flashOn() { # 2 appears to be the minimum brightness value possible
	printf '%s' "2" > /sys/class/leds/led:torch_0/brightness
	printf '%s' "1" > /sys/class/leds/led:switch_0/brightness
}

So with a loop I can have a nice flashing pattern at the minimum brightness.
Just need to find what to hook into so I can have it only running only while there is a green notifications icon.

As for using the screen, I think the green envelope icon, possibly slowly moving along the top edge of the screen (to minimise any burn in); would be a nice option there.

Just a quick post for forum lurkers that updating to 24.04-1.0 stable on Fairphone 5 has gone smoothly for me.
To install use the ubports-installer select stable and leave the wipe data unchecked.
Then do reinstall all apps from the system settings menu.

Issue with Libertine is resolved only thing I have seen an issue with is OSM server not starting for Pure Maps but I haven't tried debugging yet.

@knuddel823 It's recommended to install Fairphone version of Android 13 as per the install instructions.
https://devices.ubuntu-touch.io/device/fp5/release/noble/#installerDownload

This is a workaround that I have been trying for a little while.
Try constructing the message then switching airplane mode on then off before sending.
I read something similar on another post and it seems to work for me so far.

All notifications are affected.
The current options are wait for it to be fixed in stable or switch to daily.

Comparing with flashlight on and off.

Off
/sys/class/led/led:switch_0/brightness = 0
/sys/class/led/led:torch_0/brightness = 0
/sys/class/led/led:torch_3/brightness = 0

On
/sys/class/led/led:switch_0/brightness = 1
/sys/class/led/led:torch_0/brightness = 127
/sys/class/led/led:torch_3/brightness = 127

I'll need to test if changing these will trigger the light, certainly just making switch_0 = 1 doesn't work.
Not sure if this is the correct way to interface with these.

As for monitoring for new messages I'm wondering if dbus-monitor could be used...

Run the installer, it should detect your device and then use the option to reinstall but don't tick the wipe personal data option.

@gpatel-fr I believe you are experiencing:-
https://gitlab.com/ubports/porting/reference-device-ports/android11/fairphone-5/fairphone-fp5/-/issues/37
Which I occasionally have had on the current stable version anyway.
You can force it to happen if you play with the Network toggle buttons for a bit but in my general usage I find it's rare to trigger this bug.

@Futura Taking your example of a car...
In this situation the vehicle chassis is the equivalent of the mainboard, the chassis number is the cars identity and in most places would then be considered a different vehicle at that point you can't swap a vehicles chassis and have the "same vehicle", however, you can swap everything else even engines.
Your unlikely to find a vehicle manufacturer that would sell you just a brand new chassis, maybe in the specialist industrial space but not domestic cars.

Anyway I'm not saying I like this in any industry. It would be nice to repair everything but unless more devices are supported natively we are stuck with these workarounds and lockouts to get nicer devices running what we need.

I agree with Cibersheep here.
It's not part of the OS design to have a global back button like Android and not a requirement due to the edge OS controls.
Yes the in-app back being top left is awkward positioning for one handed use but I would find it more annoying that a window was closed/disappeared by accident from some other inconsistent close or back positioning.
I'm not against a top swipe for back on top of the standard style back, like in openstore Timer app but really following the development guidelines and being consistent between all apps is the important thing.

@t12392n
I can confirm this too.

I'm all for repairable devices and empathise with your situation.
It does make sense that you can't replace the mainboard, at that point your not repairing the device your replacing it for a new one.
I would say you've been had by the reseller and Fairphone have been pretty fair with you considering the situation.
It's probably been too long but I would take it up with ebay.

WPA & WPA2 Personal are normally grouped together.

How is not using Windows relevant to the suggestion to start again?
You're have plenty of issues that no-one else is experiencing, I'd say it's a sensible first step.
If something was borked during installation or you had the wrong Android version then the UT installed on top of that, may not function correctly.