I just did this and was impressed with how well it works. I didn’t try a separate app, though: I was using the “Screen Cast” feature that Android includes, and only one of three different Android devices I tried were able to recognize the Roku Express as an available “target” for mirroring (oddly, it was the lower-end tablet running Android Go that actually worked), but it connected and let me view the Wyze app on the larger TV screen via Roku, including letting me see a 4-group camera view in landscape mode.
While I’d still like to see an actual Wyze “channel” in Roku Channel Store, screen casting/mirroring definitely seems like one of the easiest ways to consume Wyze camera feeds on a Roku device for now.