Unable to make field ready only for a particular role

Summary:

Hi Team,

The requirement is, for employees and managers, the last working day field when they are submitting(for employees) resignation and while approving(for managers), it should be in read only mode. At the second level of approval(HRBP approval), the last working date field should be editable by the HRBP'S

Expected Flow:

1. Employee submits the resignation.
2. It goes to line manager approval
3. Manager clicks on bell notification link
4. Manager clicks on Edit
5. Resignation Reason entered by employee is editable by manager.- This should be non editable for manager. -

6. After approval of line manager, the approval will go to HRBP