Ability to make the distribution amount and combination read-only in Manage Distributions page

Summary:

Current Process:
AP Invoices are not created in the application. The data is sent through Oracle Integrations from legacy system. To prevent users from modifying the transactions, we have made the invoice amount at header and line level read-only, as well as disabling the distributions button when we are in Edit Invoices page.

Expectation:
Business would like to enable the distribution button to access Manage Distributions page to view and update additional information such as 1099 tax details but at the same time we don't want any users to modify the amount and combination that would result in the invoice going into a distribution variance hold.