Live coronavirus found on frozen food packaging in China
theguardian.com
theguardian.com
The answer is, AFAICS, "unknown". I'm surprised a lot of studies of "virus persistence on surface X" don't (yet) do animal experiments to confirm there's enough to infect something else than cells growing in a monolayer (which don't have physical barriers or other aspecific defense mechanisms).
OTOH, current (scarce) evidence still points at fomite transmission to be not very prevalent at the very least.