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System Settings → Appearance → Cursor Theme → Configure Launch Feedback
That only has nothing, static (icon), blinking (icon) or bouncing (icon) though. I find anything involving the icon jarring, especially because it keeps lagging behind the cursor. And yes, this is incredibly minor.
Seems to be some cursor themes that do it that way, like this one for example: https://store.kde.org/p/2103612
