iPhone 16 bought in the USA not getting mobile data with Nova in Greece

Bought my Iphone16 in US when living in Bahamas, it worked perfectly. Couple weeks ago moved to Greece, opened account w/ Nova and data doesnt work. Does someone knows why?if the Iphone 16 from US works

I can make and receive calls, so the phone recognize the network but I don't have data. All the settings to access to data are ok.

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