Reference field not displaying supplier data for external users in Supplier Collaboration Portal

[KomarabandaS]

Hi Community,
I am working on the Supplier Collaboration Portal and have a self-registration page for external users.
On the registration form, there is a Vendor name field which is a Reference field referencing the sn_fin_supplier table. 
The issue is that when an external user tries to register, the Supplier name reference field does not display any supplier records/data.
I have already tried creating an ACL on the sn_fin_supplier table and provided the public role, but the supplier records are still not visible to the external user.
I have attached a screenshot of the registration page for reference.

Could anyone help me understand:
1. What ACLs/roles are required for an external user to access supplier records from sn_fin_supplier?
2. Is there any additional configuration required for reference fields in the Supplier Collaboration Portal?
3. Are there any portal-specific restrictions or security configurations that prevent external users from querying the sn_fin_supplier table?
4. What would be the recommended approach to make the supplier records available in this reference field while maintaining proper security?

Environment: ServiceNow – Supplier Collaboration Portal
Any guidance on the correct configuration would be greatly appreciated.
Thank you!

[Ankur Bawiskar]

@KomarabandaS 

things to check

-> check field level READ ACL for the display field

-> check query_range and query_match ACL on that table

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