For the game I run, we’re just remote, even though we’re all in the same town and could be in person. For the group I’m a player in, we sometimes do remote, sometimes in person. When we play in person, then DM keeps Foundry on the TV. We bring laptops so we can interact with it.
As a side note one of the things I love about Foundry is how well it pairs with Dungeondraft, which is also purchase-once rather than subscription based. Makes it really easy to have custom maps