How to Make a Field Read-Only After Save on Redwood Service Request Pages?

Summary

Need to make a field (BSG Action LOV) editable during Service Request creation but automatically become read-only after the record is saved. Looking for a supported Redwood/VBS approach that can be applied to any field.

Content (please ensure you mask any confidential information)

Hello Experts,

We have a requirement in Oracle Fusion Service Redwood UI where a field should remain editable while a Service Request is being created but become read-only immediately after the record is saved.

Requirement

We have a custom LOV field:

BSG Action (LOV)

Expected behavior:

Scenario	Expected Behavior
Create Service Request	Field is editable