Do you know of any tool that can help me look at overall traffic that goes through it?

I haven’t looked in detail at the Monitoring Caddy documentation page and haven’t used this myself, but apparently it can be configured to emit a bunch of metrics in Prometheus format.

Something like countries, IPs and services that they are trying to access as well as the request types.

Oh, for that kind of thing you’d need to parse the log files instead. GoAccess maybe?