Does SharePoint modern search react refiners web part make any external call?

We want to use SharePoint SPFx https://github.com/SharePoint/sp-dev-solutions/tree/master/solutions/ModernSearch for our internal SharePoint team sites. Any web part/library is checked before it is used to make sure that it is not sending any data outside network for telemetry/analysis/application insights. I believe this web part doesn't send any data outside network. However, just want to check here to get inputs and experts' views.