To follow up on last night, I think the ekar and chorus crank are identical outside of logos. Note the rear here:
https://gravelcyclist.com/bicycle-te...avel-groupset/
The chainring shelf is identical on the back of chorus. I have not pulled mine apart, but it looks like the small chainring does not mount to the crank itself. It mounts to the large chainring tabs that go down to that lower shelf. One crank arm for 1x and 2x with a swappable inner BCD.