that is very bad to share link, what nor work! :(https://community.st.com/s/article/How-to-create-project-for-STM32H7-with-Ethernet-and-LwIP-stack-working
i have the same problem with stm32h725. I can not find plaform for stm32h725 in mbed and platformio. So i must us freeRTOS with HAL. Ethernet for this MC has al lot of problems. is there any solution?