I think this shouldn't affect the friendship in the school , however, it may mean you have to drive her around to parties and meetings though.
At DS1's school, children come from all over the county by school bus, this didn't affect him making friends. We had to drive him to his friends house. Later, when they were a bit older, they started to meet in the town by public transports.
It is different to the local school though, I can see students from local school often stay in the park after the school finished. But DS1 only meet his friends during inset day, holidays, birthdays etc. So I think this part of after school fun missed.
If you are worried, then make effort in Y7. We invited a group of his friends to our house in the first term on inset days, I think this helped. As Y7, you feel they are too young to be left at home by themselves, so it was welcomed by other mums. And DS1 got invited to his friends house as well. Once the friend group formed in Y7, there are not much effort needed from parents I think.