how to set log level for node-exporter ?

I can't find any parameter to set the log level for node-exporter.
https://prometheus-community.github.io/ansible/branch/main/node_exporter_role.html#ansible-collections-prometheus-prometheus-node-exporter-role

So i sent under PR.
https://github.com/prometheus-community/ansible/pull/553

Is there any problem with my PR? 
Or is there another way to set log level for node exporter?
