so filtering this more now and trying to get uBlock to filter out requests made to some of the #GitHub #CoPilot endpoints as well. So the extended rule set is now
||github.com/github-copilot/$xhr,1p
github.com##button[data-testid="copilot-popover-button"]
github.com##div.copilotPreview__container
github.com##div.AppHeader-CopilotChat
github.com##copilot-dashboard-entrypoint