Sorry, I don’t use that liveview script to monitor my nodes.
You can grab data from the prometheus port directly with:
curl -s -H 'Accept: application/json' http:/localhost:12788 | jq
When I do that it doesn’t give me any details about transaction count either. But, my mainnet-config.json has:
"TraceLocalTxSubmissionProtocol": false,
"TraceLocalTxSubmissionServer": false,
"TraceMempool": false,
"TraceTxInbound": false,
"TraceTxOutbound": false,
"TraceTxSubmissionProtocol": false,
Maybe you need to switch on a certain combination of these to see the transaction count???