A template for focused experience team charters from Executive Engineering1:

The {team name} provides {identified user type} with technology experiences they need in order to {what the business wants that user type to be able to do}.
We depend on {list teams at the company who produce data or code that this team depends on} and we give them the best visibility we can into our roadmap.
We're a dependency of {list teams at the company who reference data or code that this team owns} and we collaborate with them to ensure they're not blocked.
We evaluate our success by {either user NPS or something the company appreciates more} which is visible at {insert dashboard link}.

1. Danger, J. Executive Engineering: Practical Engineering Theory for Software Leaders. (The Technical Executive, 2024).