SUMMARY
In the Camera view of my Fedora 43 KDE Plasma desktop the JPGs of my Canon G7x do not show thumbnails. On a Fedora 43 Workstation (same Fedora base but Gnome instead of KDE) the thumbnails are shown in Gnome in the Camera view with the same camera. Also, when I copy images from the camera view to another folder somewhere under home, then the thumbnails are visible there (but still not in the Camera view).

STEPS TO REPRODUCE
1. Connect a camera
2. Open in File Explorer
3. Open a folder with JPG images

OBSERVED RESULT
Images are shown as standard image-icons, but not as thumbnails of the actual images.

EXPECTED RESULT
Images are shown as thumbnails of the actual images.

SOFTWARE/OS VERSIONS
Operating System: Fedora Linux 43
KDE Plasma Version: 6.5.4
KDE Frameworks Version: 6.21.0
Qt Version: 6.10.1
Kernel Version: 6.17.12-300.fc43.x86_64 (64-bit)
Graphics Platform: Wayland
Processors: 14 × Intel® Core™ Ultra 5 235T
Memory: 32 GiB of RAM (30.6 GiB usable)
Graphics Processor: Intel® Graphics

ADDITIONAL INFORMATION
Camera Canon G7x

about.txt:
PTP2 driver
(c) 2001-2005 by Mariusz Woloszyn <emsi@ipartners.pl>.
(c) 2003-2023 by Marcus Meissner <marcus@jet.franken.de>.
This driver supports cameras that support PTP or PictBridge(tm), and
Media Players that support the Media Transfer Protocol (MTP).

summary.txt:
Manufacturer: Canon Inc.
Model: Canon PowerShot G7 X
  Version: 1-14.0.1.0
  Serial Number: ....
Vendor Extension ID: 0xb (1.0)
Vendor Extension Description: 

Capture Formats: JPEG
Display Formats: Association/Directory, Script, DPOF, MS Wave, JPEG, Defined Type, Unknown(b103), Unknown(b982), Unknown(b105), Unknown(bf01)

Device Capabilities:
	File Download, File Deletion, File Upload
	No Image Capture, No Open Capture, Canon EOS Capture 2

Storage Devices Summary:
store_00010001:
	StorageDescription: SD
	VolumeLabel: 
	Storage Type: Removable RAM (memory card)
	Filesystemtype: Digital Camera Layout (DCIM)
	Access Capability: Read-Write
	Maximum Capability: 15995535360 (15254 MB)
	Free Space (Bytes): 6576406528 (6271 MB)
	Free Space (Images): -1

Device Property Summary:
Event Emulate Mode(0xd045):(readwrite) (type=0x4) Enumeration [1,2,3,4,5,6,7] value: 2
Property 0xd04a:(readwrite) (type=0x2) Enumeration [0,1,2,3] value: 0
Size of Output Data from Camera(0xd02e):(read only) (type=0x6) 524288
Size of Input Data to Camera(0xd02f):(read only) (type=0x6) 524288
Battery Level(0x5001):(read only) (type=0x2) Enumeration [0,1,2,3] value: 3% (3)
Battery Type(0xd002):(read only) (type=0x4) Enumeration [0,1,2,3,4,5] value: Unknown (0)
Battery Mode(0xd003):(read only) (type=0x6) Enumeration [0,1,2,3] value: Normal (1)
UNIX Time(0xd034):(readwrite) (type=0x6) 1767648736
Type of Slideshow(0xd047):(read only) (type=0x4) 0
DPOF Version(0xd046):(read only) (type=0x4) 257
Remote API Version(0xd030):(read only) (type=0x6) 256
Model ID(0xd049):(read only) (type=0x6) 58195968
Camera Model(0xd032):(read only) (type=0xffff) 'Canon PowerShot G7 X'
Camera Owner(0xd033):(readwrite) (type=0x4002) a[0] 
Firmware Version(0xd031):(read only) (type=0x6) 16777216
Property 0xd050:(read only) (type=0x2) 0
Property 0xd051:(read only) (type=0x4004) a[2] 14337,47490
Property 0xd052:(read only) (type=0x2) 0
Property 0xd053:(readwrite) (type=0x4002) a[0] 
Property 0xd054:(readwrite) (type=0x4002) a[0] 
Property 0xd402:(read only) (type=0xffff) 'Canon PowerShot G7 X'
Property 0xd406:(readwrite) (type=0xffff) 'Windows'
Property 0xd407:(read only) (type=0x6) 1
Property 0xd303:(read only) (type=0x2) 1
EOS_PowerZoomPosition(0xd055):(readwrite) (type=0x2) 0
EOS_StrobeSettingSimple(0xd056):(readwrite) (type=0x2) 0
EOS_DriveMode(0xd106):(readwrite) (type=0x2) 0
EOS_EVFOutputDevice(0xd1b0):(readwrite) (type=0x2) 0
EOS_BatteryPower(0xd111): error 201b on query.
EOS_BatterySelect(0xd112): error 201b on query.