@MuhammadMustafa , just to re-iterate, the ask is, if there’s any utility for rule development and testing and that is for IdentityNow. The IIQDA plugin (document shared) is something that the author looks to be aware of.
And the VS code plugin is just to manage the JSON objects on the IdentityNow tenant. It doesn’t offer any rule testing capabilities for IdentityNow, like how IIQDA does for IdentityIQ.
Please do let us know if you’re familiar with a similar utility for testing rules on IdentityNow.