Can we select all product and service category or hide page on Next Generation Supplier Registration

Summary:

Can we select all product and service category or hide product and services page on Next Generation Supplier Registration

Content (please ensure you mask any confidential information):

Our client want supplier to select all product and services or hide the page. They say when they enter negotiation some supplier complains that they were not able to see negotiation. The reason is they didnt select the product and services while registering.
So they want supplier should be able to select all product and services.

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):