@andres-garcia Do you mean for a given user? Or in general?
In general, you want to set the Tenant Session Timeout setting: https://fusionauth.io/docs/v1/tech/core-concepts/tenants#oauth
I believe that redirecting the user to the FusionAuth authorize url will extend the session (and the doc above implies it: The length of time an SSO session can be inactive before it is closed.).
I'd have to test that behavior.
Have you tried it?