https://cloud.chip.icu/apps/files_sharing/publicpreview/r7rkg6JM4GrHfKs?file=&fileId=27597&x=1920&y=1080&a=true
This is what I saw in App Manager after rooting my device, I'm on a $100 poco device with MIUI Global 12.5.2
As you can see, these are system apps, preinstalled. Doesn't matter if you're going to uninstall that preinstalled Facebook app on first boot, doesn't matter if you don't use Facebook anyways. Facebook is in your phone, already.
And if you're thinking you will simply root and remove this, please make sure there are official LOS builds the device you buy, sub $100 phones dont have that, you will find no rom, and yes I've tried GSIs and no, I could not get it to work, so I'm stuck with MIUI, and let me tell you, rooting MIUI and trying to change stuff W I L L cause it to break. BADLY. That's my experience anyways.
Please don't buy Xiaomi, and in general the trash chinese brands.