Same RG for UAT and PROD Environment : want to make update-in-place Lifecycle : Prevent_Destroy = True for RG

I deployed a UAT environment in the resource group and now want to use the same RG for the Production environment as well.

Since we are planning to keep production in the same RG so want to set prevent_destroy = true at the RG level.

But, when I run terraform plan I don’t see this change in the updates.

Is there any other better approach to protect the RG from deleting/destroying?

I have already applied locks to RG to prevent deletion.