I use Find & Replace for replacing colors very often. Unfortunatelly it doesn't work half the time. I use pipette to sample colors, but after pressing the button "Replace", I get a message, that the color is not found.
CorelDRAW 2024 version 25.0.0.230
Do you try the Color Styles for changing colors? I use Color Styles since CorelDRAW X6 instead of Find And Replace. It is very fast and ver useful.