Because this information comes from an email instead of an official statement, this information will be considered as a "rumor" for the time being. With that said, here's hoping that Square Enix does make an official statement, and with any luck, here's hoping that there WILL be a physical release of the game.
According to my @SquareEnix PR contact, a physical release of ONINAKI for the West is not planned 😥.— JP'S SWITCHMANIA (@JPSWITCHMANIA) May 22, 2019
At this time, a Japanese physical release is planned, but unsure if it will support English (hopefully it’ll follow in the I Am Setsuna camp and will!). #SwitchCorps pic.twitter.com/v2SCHlslQ1