score:2
There's only two Ch'an lines active in the West that I know of, the first one founded by Hsuan Hua. Its headquarters are in California. It has branch temples, for the West mainly in the US, listed on this page.
The second is the Western Chan Fellowship, who actually list Xuyun in their lineage, and has branches in the US and Europe.
Upvote:1
There’s an Obaku lineage in NJ. It’s not purely Chinese, but definitely more “mainland” than it is Japan.
Of course, unless you’re looking tie back into your family’s culture, does the nationality really matter? Sitting is sitting. Your legs hurt the same if you’re speaking Chinese, Japanese, or English.