Man pages matching name tshttptxnplugintagget in section 3ts:

TSHttpTxnPluginTagGet.3ts.en	debian 10 / trafficserver-dev
TSHttpTxnPluginTagGet.3ts.en	debian 11 / trafficserver-dev
TSHttpTxnPluginTagGet.3ts.en	debian 12 / trafficserver-dev