I just want to show the user name (or any of their details) on the frontend but useSessionContext returns nothing of use except the user's ID. I followed the setup guide exactly and I'm using the code from "fetching on the frontend" but accessTokenPayload is empty.

By default, the access token payload is empty. You need to add whatever info you want in it on the backend by overriding the createNewSession function: https://supertokens.com/docs/session/common-customizations/sessions/claims/access-token-payload

I did try that tutorial but it didn't do anything when added to my backendConfig. Thanks for answering, I'll try again