Yes, 100%, provided you use the correct file format.
Tap and follow the on-screen instructions specific to your MIUI or HyperOS version (e.g., "Method 3 - Latest"). Reverting to Original How to change the font? - Xiaomi camphor pro for xiaomi regular font
It is narrower than many standard sans-serifs, which can make lists and menus on your phone look less crowded. Yes, 100%, provided you use the correct file format
Xiaomi could offer within the same font family: camphor pro for xiaomi regular font