As of right now, there's no confirmation of plans to bring What Remains of Edith Finch to Switch. That doesn't mean it won't happen, though. One fan reached out to Annapurna Interactive on Twitter to comment on the lack of a Switch port, to which they responded with the following.
Don't be like Annapurna who have yet to port Edith Finch to Switch 😏😂— Andy (@sknygy) June 17, 2019
I mean, why even bother responding to this Tweet if they aren't at least considering a port? Hopefully we get the final word soon!