Unable to see entire list of business classifications in the external supplier registration page

We are in the process of implementing next generation self service supplier registration for our customer. We have created 108 business classifications for the suppliers. However we can see only 25 business classifications on the external supplier registration page. All of them should get listed.

However in the Manage Business Classification lookups page there are 108 records which are enabled as attached below. Why are the rest of the records not showing? Due to this, the supplier won't be able to select from over 80% of their classifications.

Enhancement Request / Service Request: 3-37282080441