Is it? She's not in a trade team so presumably buys whatever she needs.
ie. I've got Cannondale cranks with D2Z ring in a Shiv with DA RD and CeramicSpeed cage. The Mason has Quarq cranks with a PraxisWorks inner and a FSA outer ring with Shimano road groupset but Shimano MTB cassette.
just kinda wild she was riding that in the olympic RR. I wonder how many other people were on mismatched groupsets