The below steps worked for me to make the partial fields editable:
1. Dataverse > Tables > Forms > open the form to edit read-only columns > select a column on the form > change it to read-only > Save and Publish

2. After publishing, noticed the below issue:

3. Then have to go back to Portal Management > Basic Forms > find the same form to rebind the "Form Name" and "Tab Name" fields:
