Which 7S BMS for a mobility scooter
Yes, the amps quoted are the max that the BMS can supply. But the scooter will pull whatever the controller is limited to. So you just need to make sure your controller is limited to the same or fewer Amps than the BMS.
For example, a 20A controller paired with a 30A BMS is fine. But a 40A controller paired with a 30A BMS is not a good idea.