It might be related to sanctions on Baikal Electronics. https://news.ycombinator.com/item?id=35182705
Discussion (139 points, 1 day ago, 178 comments) https://news.ycombinator.com/item?id=41919670
Where did those maintainers go after Linux removed them from Russia?
I wonder if they will remove any of the related code for Baikal hardware.
I think it's pretty careless of GHK not to provide any references to the 'compliance requirements'. It just opens the door for all kinds of speculation and guesswork.
On another note, Huawei has 42 maintainers listed in the upstream MAINTAINERS file, even with all the sanctions from the US. It's a bit puzzling, and I'm not quite sure what to make of it.