ES 9028Q2M + STM 8S103F3

hi there, just read here:->
“it seems that there is already an MCU fitted (ST’s STM 8S103F3) programmed to allow access to some of the es9028 internal hardware functions (volume etc)…”
->LINK
(additional link->LINK)

guess on the “newer” ES9028Q2M´s (layout “2017 04 09”) there is this STM 8S103F3 and there is also a 4 pin header (5V+, SWIM,GND, Reset) to program/read out them..(SWIM-interface)

so, now is the question if someone has ever read out that eeprom (on these boards) or re-programed (and with what ?)..
any comments here concerning this topic are really,really appreciated !!

(SWIM->ST-Link-Raspberry Pi->http://kuku.eu.org/?projects/stm8spi/stm8spi )