Hi WDNJSQ,
First, check whether the traffic log function is enabled. If not, run the log type traffic enable command to enable the traffic log function.
Secondly, by default, the content of the traffic reports is not displayed in Monitor > Report > Traffic Report on the web page. If required, you can manually enable this function.
You need to configure the below command to enables the function of displaying traffic reports based on user-defined fields.
report type traffic-report item { source-IP | destination-IP | application | application-category | application-sub-category | interface | address-type | user | vsys | map | cloud-application | security-policy | all } enable
Please refer to below link for the configuration example: https://support.huawei.com/hedex/hdx.do?lib=EDOC1100092598AEI07047&docid=EDOC1100092598&lang=en&v=04&tocLib=EDOC1100092598AEI07047&tocV=04&id=EN-US_CLIREF_0178920523&tocURL=resources/cli/report_type_traffic_report_item_enable.html&p=t&fe=1&ui=3&keyword=traffic+report+configuration
I hope it helps!