Question about Google Pixel 8

Hello Community. I've asked this question before, but unfortunately haven't received a concrete answer yet. Can anyone report how the Pixel 8 behaves abroad? Do you have Volte, Vowifi and 5G as soon as you cross the border or does it fall back to 2G/3G when you call? I don't just mean neighbouring countries, but also those that are further away (America, Asia, EMEA...). Can anyone comment on this? Thanks in advance.