Are Shimano GRX Cranks and Chainrings Interchangeable?

I look into the differences and lack of differences between Shimano GRX cranks and chainrings. FC-RX810 and FC-RX820 cranks. I look at 1x and 2x setups

[@ralphwiggum4president506]

I’ve got another question. I’m switching from 1x11 GRX Di2 to 2x11 GRX Di2, I’ve got every part I need expect for the cranks.
Since you said that the part numbers on the cranks are actually identical, can I buy the 2x chainrings and just put them on the old crank? Or will there be a difference in chainline?
Thanks in advance and cheers for the video :)

[@PSIMET]

@@ralphwiggum4president506 it’s the exact same crank. Just change rings.