How can I check logs of signoz-otel-collector when running as kubernetes cluster? I want to check what exact log message I am getting at the otel collector, as I am sending trace_id and span_id from my application, but they are not getting set

It's not the issue with collector. You need to debug why they are not getting set at the application itself using the "console"/"stdout"/"debug" exporter in the language you use.