SUMMARY
In find & replace, alt shortcuts don't work.  There are duplicate alt shortcuts between the main UI and the find & replace tool.  The shortcuts inside the find & replace tool should have priority if one of the fields within the tool has focus.

STEPS TO REPRODUCE
1. Open a blank document and type "test1"
2. Press Ctrl + R to open find & replace
3. In the find box, type "test1".  In the replace box, type "test2".
4. Press Alt + R to replace, Alt + A to replace all, or Alt + F to find

OBSERVED RESULT
Rather than performing the Replace, Replace All, or Find All, it only highlights the button but doesn't press it.  If you press the same shortcut again, it will perform the action of the duplicate shortcut (Alt + R opens the Run menu, Alt + A presses the "Save All" button in the toolbar, and Alt + F opens the File menu)

EXPECTED RESULT
Pressing the alt shortcuts in the find & replace tool should press the buttons, not just highlight them.  If I remove the conflicting "Save All" button from the toolbar, then the Alt + A shortcut works as expected.

SOFTWARE/OS VERSIONS
Operating System: Arch Linux 
KDE Plasma Version: 6.2.4
KDE Frameworks Version: 6.9.0
Qt Version: 6.8.1
Kernel Version: 6.12.5-1-cachyos (64-bit)
Graphics Platform: Wayland

ADDITIONAL INFORMATION
It used to work as expected in KDE 5, and I believe it changed after switching to KDE 6.