I have Jira Software 9.12.1 license type Commercial (Data Center). When I try to add a validator for the workflow state transition from 'In Progress' to 'Code Review' so that I can make certain fields required to be filled out when this takes place these are the only options it is giving me:

However I have found information on the web that says I need to choose the 'Field Required Validator'.
Here is what we use:

How do I make this validator appear? Thanks!