Created attachment 164946 [details]
Annotated Screenshot (a picture is worth a 1000 words)

SUMMARY
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Ulinke JPG, PNG, WebP, AVIF, Dolphin is missing resolution properties for JXL files. JXL is the only photo encoding that is missing resolution properties in Dolphin. Gwenview is unaffected.
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STEPS TO REPRODUCE
1. Right click JXL File in Dolphin
2. Chose "Properties"  (Alt+Return) 
3. Go to last tab "Details" of these properties
4. Dolphin is missing Resolution

OBSERVED RESULT
Dolphin is missing Resolution.

EXPECTED RESULT
Fix Dolphin to display resolutin of JXL encoded photos. Just like it does for AVIF, JPG, PNG and WebP.

SOFTWARE/OS VERSIONS
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dolphin 23.08.4 (probably later version are affected too)
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KDE Plasma Version: 5.27.10
KDE Frameworks Version: 5.113.0
Qt Version: 5.15.12

ADDITIONAL INFORMATION

Attatchments with annotations to clearly underestand the issue:
A: JXL situation screenshot with clear nad easy to understand issue annotations 
B: AVIF situation screenshot with clear nad easy to understand issue annotations
C: WebP situation screenshot with clear nad easy to understand issue annotations