>>The default firmware of CCG3PA can only read power related information since CCG3PA is mainly used for power applications. Hence it won't be reading any data information provided in config.c. Thus the alt_mode_tbl_offset is set to 0x00.
>>It doesn't matter if the SVID node is populated or 'Modal Operation supported' is set to Yes since these fields are concerned with the data sink (responder), not with the initiator (the one which sends Discover Identity).
If you want to use CCG3PA for data roles you will have to customize the firmware.