"Attach" specific function to specific core?

[FeuerSturm]

Hey,
first of all, sorry if this is a stupid question, I'm rather new to C++.

Is there a way to attach a specific function to a specific core that I cannot execute via
setup()/setup1() or loop()/loop1() ?

This is the scenario:
Based on packets I am receiving/interpreting via a usb_hid.setReportCallback I want to execute
different functions, BUT not necessarily on the same core that I setup the hook on.
To my understanding I cannot use usb_hid.setReportCallback on setup() and on setup1() simultaniously.

Is there something I am missing, maybe an easy way of telling the Pico to run function
"void whateverfunction1()" on Core0 and "void whateverfunction2()" on Core1?

Thanks for feedback!