SUMMARY
I was checking user feedback data that was sent and noticed screen information is not quite correct.
Sent telemetry states following, note that both screen marked with devicePixelRatio = 2 and dpi is strange:
```
    "screens": {
        "data": [
            {
                "devicePixelRatio": 2,
                "dpi": 94,
                "height": 800,
                "width": 1280
            },
            {
                "devicePixelRatio": 2,
                "dpi": 99,
                "height": 1152,
                "width": 2048
            }
        ],
        "description": "Розмір і роздільна здатність усіх з’єднаних із комп’ютером дисплеїв.",
        "telemetryMode": "DetailedSystemInformation"
    },
```

While `kscreen-doctor -o | grep -E 'Output|Geometry|Scale'` provides correct information:
```
Output: 1 eDP-1
        Geometry: 384,1152 1280x800
        Scale: 2
Output: 2 DP-3
        Geometry: 0,0 2048x1152
        Scale: 1.25
```
Unfortunately it doesn't say anything about DPI, checked another:
```
$ kscreen-console outputs | grep -E '(Name|Size|Scale):'

        maxSize: QSize(64000, 64000)
        minSize: QSize(0, 0)
        currentSize: QSize(2048, 1952)
Name:  "eDP-1"
MMSize:  QSize(345, 215)
Size:  QSize(2560, 1600)
Scale:  2
        Name:  ""
Name:  "DP-3"
MMSize:  QSize(527, 296)
Size:  QSize(2560, 1440)
Scale:  1.25
        Name:  "PHL 245E1"
```
So 94 = round(2560/345*25.4/2)
99 = round(2560/527*25.4/1.25)
where
 2560 — physical size of a screen (both),
 345 & 527 — size in mm
 25.4 — mm per inch
 2 & 1.25 — real scale set for screen.

STEPS TO REPRODUCE
1. Setup two screens, one with fractional scaling 1.25, other with scaling 2.
2. Check sent kuserfeedback data.

OBSERVED RESULT


EXPECTED RESULT


SOFTWARE/OS VERSIONS
Windows: 
macOS: 
(available in the Info Center app, or by running `kinfo` in a terminal window)
Linux/KDE Plasma: 
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version: 

ADDITIONAL INFORMATION
devicePixelRatio is set to 2 for both screens, which is misleading. Also DPI is recalculated relative to real scaling (unsure if that's intentional).