Silicon Labs stopped selling Si3204 POE controllers which were inside our very popular ESP32-POE and ESP32-POE-ISO boards. There is no stock anywhere neither information when they will be back in stock. So back in August we start searching for alternative and we evaluated several other solutions. We liked most Texas Instruments and made some prototypes and verified that they works fine.
Then we run blank PCBs in production but unfortunately we hit two major Chinese Holidays, so instead the blank PCBs to arrive in the normal 2 weeks we had to wait 5 weeks to produce our order then another week to arrive here.
Meantime we sold out all our stock of ESP32-POE and POE-ISO and created solid backlog before we stop the sales on the web.
We are glad that this week we shipped all backlog orders and now the boards are again for sale!
The new revisions of the boards are REV.G and the PCB info will be updated on GitHub tomorrow. From user point of view nothing changes – the new revision operates exactly the same and have same functionality as the previous Silicon Labs based solution.
olimex 
Nov 28, 2021 @ 20:22:07
in your experience, how long does it take to be available on mouser? It first estimated Nov 26th but now no word whatsoever.
Jan 17, 2022 @ 12:09:56
I received the ESP32-POE-ISO on January 13!
The PCBA was stamped with “Rev.H”.
What is the difference between Rev.G and Rev.H?
https://github.com/OLIMEX/ESP32-POE-ISO/tree/master/HARDWARE
I hope that will be updated.
Jan 20, 2022 @ 09:09:42
Thanks for the quick update!