Stripe only allows access to the last 30 days of events, it sounds like this 3rd party is offering a service of collecting that for longer (probably among other things).
> List events, going back up to 30 days.
If you're able to go further than that you may be paying extra for it.
Now, if you have the event id then you'll be able to pull it, but you can't simply list them out unless that documentation is lying.