Sessions expiring too quickly

I’m adapting the sample PHP app to my first project, but I’m finding that users are required to login approximately every hour. Seems like the session or authentication is expiring very quickly.
I’ve tried finding expiration settings, but the only one I can find is JWT token expiration (advanced client settings), and this is already set to ten hours. Not having much luck finding answers on Google or other forum posts.
Where should I be looking? (Requiring authentication every hour is overly tedious for our application)

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