Using Lighthouse to check page loads and I see dashicons is adding to 3rd party resources. Is Dashicon used for the mobile menu icon? Is there a way to not use the dashicon off-server call and still have the mobile icon work properly?
Wait a second. Is Dashicon only used inside WP-Admin?
GP doesn’t require Dash Icons – all of the Theme icons are served as their own font ( or as SVGs if selected in Customizer > General ). So maybe one of your plugins is making that request ?