This time many ask that What is working Gcam for Poco F1 and this time Google Camera is trending for every device and but not for many like Xiaomi Redmi 5 Note Pro or Xiaomi Note 4. If you want for that you have to root that.
I have Poco Phone F1 and the working Google Camera version is 6.1.009 and if you update that many things are not working like Night Mode and Slow Motion are not working in any of version and the advantage of that is Night Mode is working in this version and sometimes slow motion is working sometimes is not but yes HDR+ is working HDR+ enhanced is also is working with high brightness.
If you are a beta version of the Poco like Android P than you allowed to install all version of Google Camera and also all the version Gcam.
The Developers also test Pixel 3 Camera ported version for Android Pie that you can find in XDA developer and use that.
Another news for Poco users is that Poco beta test requirements are on so you can apply for that. You just have to fill a Google form and apply you can find the Google form in MI Community app. The shorted people are selected for that not all how to apply for that.
The link for the working Google camera
This link is for MiUi 10.0.6 stable.