5G Apple Watch unable to make calls without iPhone nearby

Does your carrier support MultiSIM?

More basic question, do you have the additional cellular plan for the watch?

Which Apple Watch do you use, the Ultra 3 or the Series 11?

Does your carrier support 5G for your watch? For which region is your watch and iPhone registered to?

If supported, can you make calls if your watch is not connected to your iPhone via Wi-Fi or Bluetooth and you have the cellular network enabled in the Control Center?