Xiaomi does not host public firmware for all models on its global website. Reliable sources include:
Use your remote to select the Settings gear icon in the top right corner of the home screen. mi tv 4a pro 32 inch software update download
If your Mi TV 4A Pro 32-inch is working fine with no bugs, . Newer updates rarely add features and can sometimes slow down older hardware. Xiaomi does not host public firmware for all