@Veronica91Im racking my brain from when I worked in Italy and I used TIM rather than Vodafone IT.
You shouldn't need to change your APN on android as it should work as in the UK.
You dont have mobile data roaming switched off in the Mobile Data settings by any chance as the default is now for that to be switched off
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iPhone 16 Pro Max - o2 and Spusu
Galaxy Z Fold 6 - Mozillion
iPad Pro 11 M4 - Three
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This is not customer services and we dont have access to your account
I do not work for o2 or any VMo2 /Telefonica/Liberty Global Company