11 days of supply in the system. If they can afford it they can add to that with new shipments. It is not like Taiwan is blockaded. Just that global supply from single region is limited.
This might be lot bigger issue if China managed blockaded Taiwan during an invasion. Or destroy port facilities sufficiently.
You need metrics to compare it over time; I only have a weeks worth of food in the house but I shop weekly kind of thing.
Not blockaded, sure, but how long would it take for these new shipments to arrive? If these are shipments they hope can come through the SoH even if they got through tomorrow it would take ~10 days to arrive in Taiwan. They can also get LNG from Australia, but a typhoon has shut down some of Australia's LNG terminals today.