SUMMARY
***

STEPS TO REPRODUCE
1. install alpine linux sys install
2. setup xorg, install kde-plasma, e2fsprogs etc
3. install partition manager
4. parititionmanager fails to detect filesystem tools

OBSERVED RESULT
Filesystem support tools not detected.

At least ntfs-3g & e2fsprogs weren't detected rendering partitionmanager unsuable.

EXPECTED RESULT
Filesystem support tools detected.


SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Alpine Linux 3.15.4, 5.15.50-0-lts
(available in About System)
KDE Plasma Version: 5.23.5
KDE Frameworks Version:  5.88.0
Qt Version: 5.15.3

ADDITIONAL INFORMATION
```
$ apk info | grep -E "e2fsprogs|ntfs"
e2fsprogs-libs
e2fsprogs
ntfs-3g-libs
ntfs-3g
```
---
Popup shows:

No support tools were found for file systems currently present on hard disks in this computer:
Partition
File System
Support Tools
URL
/dev/sdb2
ntfs
ntfs-3g
https://www.tuxera.com/community/open-source-ntfs-3g/
/dev/sdc2
ext4
e2fsprogs
http://e2fsprogs.sf.net

As long as the support tools for these file systems are not installed you will not be able to modify them. 
You should find packages with these support tools in your distribution's package manager.
---