Sadly, in the same post, Okunari confirms that there are no plans for another hardware release this year – although he does encourage fans to re-watch the 2022 announcement as "I think you'll forget a lot of things after two years, so if you watch this program again after a long time, I think you'll enjoy it again!"
Speaking of the anniversary of Sega's founding, it's been exactly two years since the #メガドラミニ 2 announcement today. I don't have any announcements this year either, but I think you'll forget a lot of things after two years, so if you watch this program again after a long time, I think you'll enjoy it again!
As noted by @gosokkyu, today also marks the fourth anniversary of the Game Gear Micro's reveal – and is the 64th birthday of Sega as a business.
The company previously ran a poll to see what 'mini' hardware fans wanted to see next, and the Saturn came out on top.
However, Sega President and COO Yukio Sagano dampened expectations that a Saturn Mini was in the works, pointing out that "the Sega Saturn is surprisingly high performance, so the difficulty of miniaturization is [...] high."
Sagano added, "I don't think it's a case of saying 'let's make another one because it sells well' it looks like it's going to be a little longer. I'd like to think about it when we're in a situation where we can openly develop it together with people who have always loved the Sega Saturn and Dreamcast."