It appears as though Xiaomi is pulling a Samsung with a half-step upgrade for MIUI 12. The update will supposedly be called MIUI 12.5, and will feature multiple UI changes from MIUI 12. Xiaomi is yet to officially upgrade many devices from MIUI 11 to MIUI 12, though.
https://www.notebookcheck.net/MIUI-12-5-rumoured-to-arrive-soon-with-multiple-changes-from-MIUI-12.508586.0.html
I hope you put a gadget for download booster wifi+data at the same time for better performance download more faster 😉🙂 8)
The Horizontal Items in Recents will get added with a launcher update. It's not a part of MIUI 12.5.