Single pair ethernet (SPE) PHY with ESP32
Can I connect this Single Pair Ethernet PHY DP83TC811R-Q1 to a ESP32 chip?


NO.

The DP83TC811R-Q1 is a PHY implementation, and it connects to a MAC implementation driven by an Ethernet controller. To support this chip on an ESP32 would require that you select a MAC chip and connect that to the PHY.....but beyond that you need an Ethernet controller to build the protocol packets to be serialized.