Using Rest API (for Forge app) to add an approval step to a workflow

Hello:

Is there a Rest API (for Forge app) to add an approval step to a workflow?

I’ve seen this but not clear if approver can be set as a key/property.
https://developer.atlassian.com/cloud/jira/platform/rest/v3/api-group-workflow-transition-properties/#api-rest-api-3-workflow-transitions-transitionid-properties-put