Refresh token expiration

It is suggested in the docs that once users authenticate, they are essentially logged in forever (or until they physically log out) if the refresh token is used to get new access tokens. Upon decoding the refresh token, I see that realm is setting an expiration date for the jwt. It looks like it’s a little over a year away. My question is, how do I remove that expiration date? If I can’t, will all users eventually get logged out once that expiration day is passed? I don’t see anyway for users to get new refresh tokens. Is that possible? Any help here would be greatly appreciated!