I hope everything went well for her and the pups are healthy
Keep quiet for now and don't disturb her. You can start to give protein foods, as well as nuts and seeds to help with milk production
Porridge and veggies are also great. Try just to give enough for mum at this point, you don't want to have veggies going mouldy in the nest with the pups.
Pups will need to start having other sources of hydration from around 5 days, so little bits of cucumber around the nest will help with that. Increase the amount of food you give at this time too because this is when they start to eat solids.