There are many ideas for tools for uncoupling Kadee LS couplers. All serve their owners well.
We find using thin long stemmed Philips screw drivers work well, although the supposed new and improved Kadee “E type” couplers don’t like most devices as well as the old, faithful 820’s/830’s.
Another simple device is a plain wooden skewer, slightly flattened at the blunted tip…rather inexpensive…!! (Works well with the smaller scales)
Fred Mills