I'm working on a project where I'm using graphql-yoga to store data on a Prisma database, but I also want to process some data on my server. Is there a way to do that with graphql-yoga or is it only for interacting with the database?

You can do any kind of data computation in GraphQL Yoga as it is just a node process you can interact in. The Prisma Server is there for database interactions so you can't do any custom computation in it. But it is certainly possible with yoga