pretty much all sony 60 HZ tvs are able to present 24 hz correctly all 60 HZ Tv are able to accept this type of signal but they usually unable to display them correctly which is called 3:2 judder.
BTW. because you can't select 120 hz doesn't mean the panel is run at that refreshrate.
there is a very easy test to check if a panel is 120 hz send 60 HZ and try to enable motion interpolation if it works by giving you a horrific image it's pretty much proven that the panel is 120 HZ.
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