Strange cos your box is ATV. My Mecool KM3 has it in play store provided it is not connected thru any overseas vpn

Are you using US Google account on the box?
The app is only available for Malaysia Google account.

Go to: https://play.google.com/store/apps/details?id=com.tm.unifitv
Login with same account & check if your mibox is listed as supported device.

Also can you try to access the link on your mibox to open the unifi tv app section on play store & see if there is any error message.

Emm.. that's weird..
I remember before this mibox 3 user can install the app from playstore unless TM decide to drop support which will be weird coz till today Xiaomi is still releasing updates.

Did you manage to install the app via playstore before this?
Did u change any settings via adb? Like DPI?

Not sure want is happening, maybe can try the following;-
1. Try to use new google account
2. Factory reset

Where did u bought it?
Does the box support Chromecast?
Can u screenshot the about section with build number.

check the model number "MDZ-16-AB" on the box behind.

I am using unifi tv apps on my android tv (6.0.1).
every time I exit/back/home the apps, the audio retain in the background...
I need to force stop or reboot the tv in order for it to quit...

Anyone else having this similar issue?

In my box still have but not the app. Since my parents using the box, I can only watch using the app, maybe just an error 

I tested two days ago and not noticed. Try to search sport channels and see.

So where can I watch formula one now?

Yup really bad.. What to do? The best choice I have is use Njoi with satellite.

I’m jealous. Need to vpn to Albania to watch on their channel now

Anyone watching badminton with the silver/white box? Are you experiencing video stuttering?

RM0 unifi: You're entitled to redeem FREE access to IQIYI app included in your Ruby Plus Pack! Activate here i.unifi.my/ac & stream from 1/1/2022

Everyone not read the sms which stated clearly from 1/1/2022?

Nope, beIN Sports not available if you're not unifi customers
SPOTV RM40

IMO if you don't subscribe to UnifiTV,  you can just subscribe to Bein Sports Connect directly instead of going through Unifi TV 
But it cost around RM160 per year (cheaper), or RM20 per month

Honestly if you want to watch sports, and prefer to watch online, Unifi TV (app version) has the most delay (around 1 minute++). Bein Sports Connect's app is around 30ish seconds delay (but 720p only), which is similar to Sooka (it has 1080p 50FPS if you sub it's highest tier). So if you want the least delay, Bein Sports Connect would be the one to get for Bein's broadcast