It can be used with Simplicity Studio - I’ll have a look through my projects to see how I did it. Been a while.
I generally don’t use the USB/SWD approach for flashing/debugging in 'Studio as I have my “development platform” which has a JLink/SWD connection, additional reset button and battery connections soldered in.
Probably the easiest would be to use VSCode and the Silicon Labs extension, Cortex Debugger and OpenOCD with a custom launch.json.