Unknown host on Burp Suite when trying to access *.localhost

Unknown host on Burp Suite when trying to access *.localhost

I am trying to analyze HTTP traffic of our application. Application has two accessible portals, one accessible by admin.localhost:3002 and the other accessible by localhost:3002

I have Burp Suite proxy on 127.0.0.1:8080, certs configured in firefox and localhost hijacking enabled in config.

Access to localhost:3002 works fine but when it tries to access admin.localhost:3002 (or any other subdomain) it shows Unknown Host: admin.localhost

I can't create a resolver as I do not have access to sudo. How do I configure Burp Suite to resolve *.localhost?