Looking at the top right sections of the schematic, where the RESET button sits is a component marked J3. I assume those are the 5 dots on the bottom of the board.
Can I understand that as some form of ICSP port?
If so it doesnt seem to follow standard pinout for an ICSP port
A bit lower are 2 components marked U4A and U4B, that I can´t associate at all. There is a comment next to it saying Crypto Auth. Does someone know what kind of components those are and what their function is?