At the current time of writing, Supabase does not offer a generic OAuth 2.0 or OIDC solution. However, it is still possible to connect Edlink with Supabase via their support for Keycloak. Essentially, you will set up Keycloak as an identity provider for Supabase, and then connect Edlink as an identity provider to Keycloak.
We will update this guide if Supabase adds built-in support for OIDC providers in the future.