by morgano » Jul 13th, '21, 12:51
Open the .desktop file in a text editor.
In the line starting "Icon=" you see the icon filename, maybe complete path.
If it is in a standard location it seems no path nor extension is shown, but now easier to search.
If everything fail, take a screenshot of it...
Mandriva since 2006, Mageia 2011 at home & work. Thinkpad T40, T43, T400, T510, Dell M4400, M6300, Acer Aspire 7. Workstation using LVM, LUKS, VirtualBox, BOINC