Funny that you brought up the Sequoia. Since they will both start production at the same time you would think they would also be unveiled around the same time frame.
I think you're referring to this old post.
Wasn't COVID the reason for the late announcement for the 2021 MY? Since things have somewhat gotten back to normal I think a 2023 MY debut for next month could be possible.
Mazda's patent pending (2022.1.6), which was newly released this week, "Contents related to hybrid vehicles that use a rotary engine for driving"
https://taku2-4885.hatenablog.com/entry/2022/01/06/113840