Users can view only the asset information for Azure WAF Policy within CloudHealth via the Azure Assets report section. There will be no costs directly associated with the WAF Policy or Rule.
1. The user can see asset information for the Azure WAF Policy under the asset report. As shown below.
2. WAF policy in Azure will incur a cost, as you are charged based on the usage of the Application Gateway where the WAF functionality is implemented. There will not be additional cost for the WAF Policy/Rule.
Refer: https://azure.microsoft.com/en-us/pricing/details/web-application-firewall/