The "top" configs change daily because Airtel patches IPs frequently.
If you still decide to search for these files: airtel dark tunnel config file download top
Once you have found a verified source and downloaded a file, here is the standard procedure (this applies to apps like HTTP Injector or HA Tunnel Plus): Save the new APN settings
If you downloaded a "top" config but Airtel is blocking it, check these three things: The "top" configs change daily because Airtel patches
1.1.1.1 (Cloudflare) inside the Dark Tunnel app.