Unable to advance search for the supplier in the RSSP

Summary:

Content (please ensure you mask any confidential information):

In the current Self Service Procurement we can use the search for a supplier using any letters contained in their name.

In RSSP the Supplier Name field is a dropdown and we have to enter the first 3 characters and cannot do a ‘Contains’ or wildcard search. Advance search option is not coming

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

24B

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