Antiochian Orthodox Church of North America
I may be misunderstand this, so please correct me if needed. If I understand correctly, the Antioch Church, which is EO, allows Coptic Christians who are OO, to take communion in their churches. This seems like is would cause an issue with the other EO churches and Antioch, has this been the case?
I have seen individual situations in both the OCA and the UOC-USA where Oriental Orthodox were communed. In the cases with which I am familiar, those Oriental Orthodox were known to the relevant parish priest and, presumably, had discussed the situation with him, discussions to which I was not privy.
It is my anecdotal observation that the practice, on an individual level, is far more widespread than some recognize, particularly in places where persecution is rampant and where the Oriental Orthodox are without nearby parishes in the diaspora.
I do not have a listing of each North American jurisdiction's view on the matter. I'm sure that there are some who would be more reluctant than others to do this. But, in my limited awareness of such things, I'm not at all aware of this being an actively-debated "issue" anywhere in inter-jurisdictional discussions in North America.