Man pages matching name tshttptxncachelookupurlget in section 3ts:

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