Driving mode T8 in snow and snow

Hello Foristi, I drive an XC90 II T8 and have a question about the driving modes. In the Rhine-Main area it has snowed a few times now and I am unsure which driving mode is the right one in these weather conditions. In AWD mode it seems to never drive electric, but only with burner – but probably constant with four wheel. In hybrid and pure mode it can also be electric and probably only switches on the four wheel if necessary. How do you do that? Greetings Tom