I made W5500-EMAC library with a driver for Wiznet W5500 and I tested it with Nano RP2040 with a Wiz850io module. It should work with Giga with Arduino Ethernet 2 shield and with Portenta H7 boards with MKR ETH shield. But I don't have Giga or the Portenta to test it. Could somebody please test it?
Install the library from zip downloaded from GitHub. For Giga it is neccessary to copy the Mbed Core Ethernet library to platform's libraries. Copy it from Portenta platform installation.
The library has an example to test it.