This is not feasible due to Discord embed limits (full embed of all fields can only be so long, so individual fields have their own limitations to adjust for that)
The reason why it cuts off showing IDs with 6+ groups is bc of character limits within the embed. Discord embeds can only be so long, so the individual fields have their own individual limits to make sure that the overall member card doesn't go over the limits & break something. Plus having the stack of IDs + Groups can make the card get even taller, esp if a member is in a lot of groups